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288 vulnerabilities found for by nextcloud

CVE-2026-45810 (GCVE-0-2026-45810)
Vulnerability from cvelistv5
Published
2026-06-01 17:13
Modified
2026-06-02 12:48
Severity ?
6.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.12, and 32.0.0 to before 32.0.3, a missing check of a relation allowed authenticated users with access to any file comment, to read the content of all comments. It is recommended that the Nextcloud Server is upgraded to 31.0.12 or 32.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 21.0.9.20, 22.2.10.35, 23.0.12.31, 24.0.12.30, 25.0.13.25, 26.0.13.22, 27.1.11.22, 28.0.14.13, 29.0.16.10, 30.0.17.5, 31.0.12 or 32.0.3
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 31.0.0, < 31.0.12
Version: >= 32.0.0, < 32.0.3
 Create a notification for this product.
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{
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CVE-2026-45722 (GCVE-0-2026-45722)
Vulnerability from cvelistv5
Published
2026-06-01 17:11
Modified
2026-06-01 19:33
Severity ?
7.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
CWE
  • CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Summary
Nextcloud is an open source content collaboration platform. From versions 0.9.0 to before 0.9.7, and 1.0.0 to before 1.0.2, a missing sanitization in the Tables app allowed a user with access to the tables app to perform a limited SQL injection in the ORDER BY statement of a query. Compared to normal SQL injections, the ORDER BY is limited to extracting a single bit of information per request or to make the database wait for a given time. This issue has been patched in versions 0.9.7 and 1.0.2.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 0.9.0, < 0.9.7
Version: >= 1.0.0, < 1.0.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-45691 (GCVE-0-2026-45691)
Vulnerability from cvelistv5
Published
2026-06-01 17:09
Modified
2026-06-01 19:10
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, a pre-2FA session cookie (created after successful password authentication but before TOTP completion) could be reused as a Bearer token to authenticate against DAV endpoints, granting read/write access and bypassing mandatory two-factor authentication. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9 or 29.0.16.16
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.9
Version: >= 33.0.0, < 33.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-45690 (GCVE-0-2026-45690)
Vulnerability from cvelistv5
Published
2026-06-01 17:08
Modified
2026-06-02 12:49
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authentication bypass vulnerability allowed attackers with knowledge of a user's password to circumvent two-factor authentication (2FA) protections. When a user initiated login with valid credentials on a 2FA-enabled account, the system created a temporary session token before enforcing the second factor challenge. This token could be extracted and replayed via HTTP Basic Authentication to gain unauthorized access to authenticated endpoints. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9 or 29.0.16.16
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.9
Version: >= 33.0.0, < 33.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-45545 (GCVE-0-2026-45545)
Vulnerability from cvelistv5
Published
2026-06-01 17:05
Modified
2026-06-02 15:23
Severity ?
8.2 (High) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE
  • CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Summary
Nextcloud is an open source content collaboration platform. From versions 0.7.0 to before 0.7.7, 0.8.0 to before 0.8.10, 0.9.0 to before 0.9.8, and 1.0.0 to before 1.0.4, an authenticated attacker with access to the Tables app may be able to execute arbitrary up to 20 bytes long SQL queries, through a stored injection. With carefully crafted input it is possible to break out of the length limitation. The attacker could use this to extract information from the database, or modify data. This issue has been patched in versions 0.7.7, 0.8.10, 0.9.8, 1.0.4, and 2.0.0.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 0.7.0, < 0.7.7
Version: >= 0.8.0, < 0.8.10
Version: >= 0.9.0, < 0.9.8
Version: >= 1.0.0, < 1.0.4
 Create a notification for this product.
Show details on NVD website

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{
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CVE-2026-45544 (GCVE-0-2026-45544)
Vulnerability from cvelistv5
Published
2026-06-01 17:03
Modified
2026-06-01 21:40
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-1230 - Exposure of Sensitive Information Through Metadata
Summary
Nextcloud is an open source content collaboration platform. From version 0.8.0 to before version 1.0.4, the view filter criteria is exposed to users with read-only permissions in Nextcloud Tables. This issue has been patched in versions 1.0.4 and 2.0.0.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 0.8.0, < 1.0.4
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45543 (GCVE-0-2026-45543)
Vulnerability from cvelistv5
Published
2026-06-01 17:00
Modified
2026-06-01 19:33
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-552 - Files or Directories Accessible to External Parties
Summary
Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 4.3.0, < 5.2.7
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45286 (GCVE-0-2026-45286)
Vulnerability from cvelistv5
Published
2026-06-01 16:59
Modified
2026-06-01 19:13
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
Nextcloud is an open source content collaboration platform. From versions 5.5.13 to before 5.5.17, and 6.2.0 to before 6.2.3, an authenticated user can enumerate users on the same Nextcloud instance by using the Calendar app's endpoint for suggesting attendees. The sharing restrictions, applied to other endpoints, were not effective here. This issue has been patched in versions 5.5.17 and 6.2.3.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 5.5.13, < 5.5.17
Version: >= 6.2.0, < 6.2.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45284 (GCVE-0-2026-45284)
Vulnerability from cvelistv5
Published
2026-06-01 16:57
Modified
2026-06-02 15:22
Severity ?
4.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
CWE
  • CWE-284 - Improper Access Control
Summary
Nextcloud is an open source content collaboration platform. From version 1.3.6 to before version 8.4.0, an improper check allowed users that where provided by LDAP to still authenticate towards user OIDC after they where deleted. This issue has been patched in version 8.4.0.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 1.3.6, < 8.4.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45285 (GCVE-0-2026-45285)
Vulnerability from cvelistv5
Published
2026-06-01 16:57
Modified
2026-06-02 12:50
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
CWE
Summary
Nextcloud is an open source content collaboration platform. From versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a user shares a folder or file with a Nextcloud Team that includes an external member (a person added via email address who does not have a Nextcloud account), the system automatically creates a public link for that external member. This public link is not displayed in the share section of the folder, so the folder owner has no knowledge of its existence. It is sent via email to the external member. It grants the same permissions (read, write, delete, reshare, download) as the Team’s access. An attacker who receives or intercepts this link can access, modify, delete, reshare, and download all data in the shared folder without any further authentication. The folder owner cannot see or revoke the link through the normal sharing interface. This issue has been patched in versions 32.0.9 and 33.0.3.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.9
Version: >= 33.0.0, < 33.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
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              "content": {
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CVE-2026-45283 (GCVE-0-2026-45283)
Vulnerability from cvelistv5
Published
2026-06-01 16:53
Modified
2026-06-01 21:42
Severity ?
6.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-287 - Improper Authentication
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.2, and 33.0.0 to before 33.0.1, the files_lock app did not properly validate the ownership of files when processing DAV lock and unlock requests. An authenticated user could lock or unlock files belonging to other users by targeting their absolute WebDAV paths. Additionally, lock tokens were disclosed to unauthorized callers in error responses, allowing attackers to remove token-based locks placed by other users' client applications. It is recommended that the Nextcloud Server is upgraded to 32.0.2 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 31.0.14.4 or 32.0.2 or 33.0.1
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.2
Version: >= 33.0.0, < 33.0.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
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      {
        "metrics": [
          {
            "other": {
              "content": {
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CVE-2026-45282 (GCVE-0-2026-45282)
Vulnerability from cvelistv5
Published
2026-06-01 16:53
Modified
2026-06-01 19:28
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-284 - Improper Access Control
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, an authenticated attacker can access attachments of link shares when knowing the share token, circumventing password protection or download restrictions. It is applicable to any file that is shared directly, as the attacker only needs to know a documentId they own, apart of the mentioned share token. For shared folders the attacker has to know or guess a documentId of a file that is included inside the folder, making it much harder to exploit. The attacker can only extract an attachments, but not the file shared file or folder itself. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17 or 27.1.11.5
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.9
Version: >= 33.0.0, < 33.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45282",
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CVE-2026-45281 (GCVE-0-2026-45281)
Vulnerability from cvelistv5
Published
2026-06-01 16:52
Modified
2026-06-01 19:22
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, with the knowledge of other users’ principal URL an attacker could possibly send a request to gain full access to their calendar. Therefore, the attacker must be an authenticated user. This is because of improper authorization controls in the backend of the calendar. If the attacker had access to the calendar, they would be able to view and modify it. It is recommended that the Nextcloud Server is upgraded to 33.0.3 or 32.0.9. It is recommended that the Nextcloud Enterprise Server is upgraded to 33.0.3, 32.0.9, 31.0.14.5, 30.0.17.9, 29.0.16.16, 28.0.14.17, 27.1.11.26, 26.0.13.26, 25.0.13.29, 24.0.12.34, 23.0.12.35, 22.2.10.39, or 21.0.9.23
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.9
Version: >= 33.0.0, < 33.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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        }
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CVE-2026-45279 (GCVE-0-2026-45279)
Vulnerability from cvelistv5
Published
2026-06-01 16:52
Modified
2026-06-02 12:50
Severity ?
4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 31.0.0 to before 31.0.14, and 32.0.0 to before 32.0.4, if {lang} is used in the template directory config value, non-admin users can in some cases copy arbitrary files (depending on unix permissions) into their own Nextcloud directory via a path traversal. It is recommended that the Nextcloud Server is upgraded to 32.0.4, 31.0.14. It is recommended that the Nextcloud Enterprise Server is upgraded to 32.0.4, 31.0.14, 30.0.17.7, 29.0.17.12, 28.0.14.15
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 31.0.0, < 31.0.14
Version: >= 32.0.0, < 32.0.4
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45278 (GCVE-0-2026-45278)
Vulnerability from cvelistv5
Published
2026-06-01 16:51
Modified
2026-06-02 15:20
Severity ?
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Summary
Nextcloud is an open source content collaboration platform. From version 6.1.0 to before version 8.2.2, an attacker can craft links that would redirect users to another website, when the victim uses the attackers link to log in via user OIDC. This issue has been patched in version 8.2.2.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 6.1.0, < 8.2.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45277 (GCVE-0-2026-45277)
Vulnerability from cvelistv5
Published
2026-06-01 16:51
Modified
2026-06-01 21:43
Severity ?
3.3 (Low) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, authenticated users can check if arbitrary files are associated with specific approval workflows where they can request approval. This issue has been patched in version 2.7.2.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 2.7.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45275 (GCVE-0-2026-45275)
Vulnerability from cvelistv5
Published
2026-06-01 16:51
Modified
2026-06-01 19:31
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
Summary
Nextcloud is an open source content collaboration platform. Prior to version 2.7.2, a privilege escalation vulnerability exists in the Approval app that allows a user without sharing permissions to force the system to share a file with approvers. This results in an authorization bypass and privilege escalation, allowing unauthorized distribution of restricted files. This issue has been patched in version 2.7.2.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 2.7.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2026-45267 (GCVE-0-2026-45267)
Vulnerability from cvelistv5
Published
2026-06-01 16:40
Modified
2026-06-01 18:12
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-862 - Missing Authorization
Summary
Nextcloud is an open source content collaboration platform. Prior to version 5.2.6, a missing permissions check allowed users to request reading form submissions of other users. This issue has been patched in version 5.2.6.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 5.2.6
 Create a notification for this product.
Show details on NVD website

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{
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CVE-2026-45266 (GCVE-0-2026-45266)
Vulnerability from cvelistv5
Published
2026-06-01 16:39
Modified
2026-06-01 17:40
Severity ?
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-284 - Improper Access Control
Summary
Nextcloud is an open source content collaboration platform. Prior to versions 21.1.10, 22.0.11, and 23.0.3, a low-privileged user can force other user's microphones to be muted in calls when no High-performance Backend is installed. This issue has been patched in versions 21.1.10, 22.0.11, and 23.0.3.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 21.1.10
Version: < 22.0.11
Version: < 23.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45159 (GCVE-0-2026-45159)
Vulnerability from cvelistv5
Published
2026-06-01 16:39
Modified
2026-06-01 19:30
Severity ?
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud is an open source content collaboration platform. From versions 1.15.0 to before 1.15.4, 1.16.0 to before 1.16.3, 1.17.0 to before 1.17.1, and 1.18.0 to before 1.18.1, a malicious user with access to an end-to-end encrypted files drop link was able to also drop files into other end-to-end encrypted folders of the share owner. Reading and modifying of other files was not possible. This issue has been patched in versions 1.15.4, 1.16.3, 1.17.1, 1.18.1, and 2.0.0-rc.7.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 1.15.0, < 1.15.4
Version: >= 1.16.0, < 1.16.3
Version: >= 1.17.0, < 1.17.1
Version: >= 1.18.0, < 1.18.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45157 (GCVE-0-2026-45157)
Vulnerability from cvelistv5
Published
2026-06-01 16:39
Modified
2026-06-01 18:49
Severity ?
6.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:N
CWE
  • CWE-284 - Improper Access Control
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.9, and 33.0.0 to before 33.0.3, when a malicious user has access to a file share of a user, they could use this share token to also access the chunking upload directly and see temporary part files during on going uploads. It is recommended that the Nextcloud Server is upgraded to 32.0.9 or 33.0.3. It is recommended that the Nextcloud Enterprise Server is upgraded to 26.0.13.26, 27.1.11.25, 28.0.14.17, 29.0.16.16, 30.0.17.9, 31.0.14.5, 32.0.9 or 33.0.3
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.9
Version: >= 33.0.0, < 33.0.3
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
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CVE-2026-45156 (GCVE-0-2026-45156)
Vulnerability from cvelistv5
Published
2026-06-01 16:38
Modified
2026-06-03 03:55
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE
  • CWE-287 - Improper Authentication
Summary
Nextcloud is an open source content collaboration platform. From versions 0.3.0 to before 3.1.0, 5.0.0 to before 5.1.0, and 6.0.0 to before 6.4.0, a missing signature verification in User OIDC allowed a malicious ID4me authority to identify as any user. This issue has been patched in versions 3.1.0, 4.1.0, 5.1.0, 6.4.0 and 8.3.0.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 0.3.0, < 3.1.0
Version: >= 5.0.0, < 5.1.0
Version: >= 6.0.0, < 6.4.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45156",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-02T00:00:00+00:00",
                "version": "2.0.3"
              },
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-03T03:55:47.564Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "security-advisories",
          "vendor": "nextcloud",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.3.0, \u003c 3.1.0"
            },
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              "status": "affected",
              "version": "\u003e= 5.0.0, \u003c 5.1.0"
            },
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            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Nextcloud is an open source content collaboration platform. From versions 0.3.0 to before 3.1.0, 5.0.0 to before 5.1.0, and 6.0.0 to before 6.4.0, a missing signature verification in User OIDC allowed a malicious ID4me authority to identify as any user. This issue has been patched in versions 3.1.0, 4.1.0, 5.1.0, 6.4.0 and 8.3.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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          }
        }
      ],
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              "lang": "en",
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          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-qqgv-fqwp-mjpp"
        },
        {
          "name": "https://github.com/nextcloud/user_oidc/pull/1285",
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            "x_refsource_MISC"
          ],
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        },
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          "name": "https://hackerone.com/reports/3489490",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/3489490"
        }
      ],
      "source": {
        "advisory": "GHSA-qqgv-fqwp-mjpp",
        "discovery": "UNKNOWN"
      },
      "title": "Nextcloud: Authentication Bypass in ID4me handling via Missing JWT Signature Verification in User OIDC"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
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    "dateReserved": "2026-05-08T20:44:38.964Z",
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  "dataType": "CVE_RECORD",
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}

CVE-2026-45155 (GCVE-0-2026-45155)
Vulnerability from cvelistv5
Published
2026-06-01 16:38
Modified
2026-06-01 18:09
Severity ?
2.6 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud is an open source content collaboration platform. In Nextcloud Server from versions 32.0.0 to before 32.0.7 and 33.0.0 to before 33.0.1, a missing access check on API level allowed to add unknown circles by their ID directly to other circles. Since circle IDs have 62^15 complexity by default this is still unlikely to be executable at will, but if access to an ID was available via another source, memberships could be tracked like this. It is recommended that the Nextcloud Server is upgraded to 32.0.7 or 33.0.1. It is recommended that the Nextcloud Enterprise Server is upgraded to 29.0.16.14, 30.0.17.8, 31.0.14.3, 32.0.7 or 33.0.1
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 32.0.0, < 32.0.7
Version: >= 33.0.0, < 33.0.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45155",
                "options": [
                  {
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                  },
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                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-01T18:09:03.555046Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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            {
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            },
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            }
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        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
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            "baseScore": 2.6,
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            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
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              "type": "CWE"
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          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-01T16:38:33.335Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xpgv-grf9-gm7x"
        },
        {
          "name": "https://github.com/nextcloud/circles/pull/2401",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/circles/pull/2401"
        },
        {
          "name": "https://hackerone.com/reports/3511998",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/3511998"
        }
      ],
      "source": {
        "advisory": "GHSA-xpgv-grf9-gm7x",
        "discovery": "UNKNOWN"
      },
      "title": "Nextcloud: Private circle can be added to another circle via API"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
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    "datePublished": "2026-06-01T16:38:33.335Z",
    "dateReserved": "2026-05-08T20:44:38.964Z",
    "dateUpdated": "2026-06-01T18:09:28.247Z",
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  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-45154 (GCVE-0-2026-45154)
Vulnerability from cvelistv5
Published
2026-06-01 16:37
Modified
2026-06-01 17:40
Severity ?
2.6 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N
CWE
  • CWE-284 - Improper Access Control
Summary
Nextcloud is an open source content collaboration platform. From version 2.6.0 to before version 4.3.0, when a previous collective pages was deleted and the collective was shared view-only, guests with access to the collective were able to access the deleted pages directly from the trashbin. This issue has been patched in version 4.3.0.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 2.6.0, < 4.3.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45154",
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                  },
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-01T17:40:40.788059Z",
                "version": "2.0.3"
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          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-01T17:40:50.457Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
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          "vendor": "nextcloud",
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            {
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
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        },
        {
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        "advisory": "GHSA-8mpv-ggq8-hf3w",
        "discovery": "UNKNOWN"
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  "dataType": "CVE_RECORD",
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}

CVE-2026-45153 (GCVE-0-2026-45153)
Vulnerability from cvelistv5
Published
2026-06-01 16:37
Modified
2026-06-01 17:53
Severity ?
4.6 (Medium) - CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
CWE
  • CWE-287 - Improper Authentication
Summary
Nextcloud is an open source content collaboration platform. From version 33.0.0 to before version 33.1.0, after unlocking a locked Android phone the back-button could be used to bypass the Nextcloud Files app PIN. This issue has been patched in version 33.1.0.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 33.0.0, < 33.1.0
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45153",
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                  },
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        }
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      "metrics": [
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CVE-2026-45264 (GCVE-0-2026-45264)
Vulnerability from cvelistv5
Published
2026-06-01 16:36
Modified
2026-06-01 17:47
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-284 - Improper Access Control
Summary
Nextcloud is an open source content collaboration platform. From versions 17.0.0 to before 17.0.15, 18.0.0 to before 18.1.12, 19.0.0 to before 19.1.16, 20.0.0 to before 20.1.11, and 21.0.0 to before 21.0.4, a user with READ and CREATE permission, but no UPDATE permission for a team folder can rename files in the team folder. This issue has been patched in versions 17.0.15, 18.1.12, 19.1.16, 20.1.11, and 21.0.4.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 17.0.0, < 17.0.15
Version: >= 18.0.0, < 18.1.12
Version: >= 19.0.0, < 19.1.16
Version: >= 20.0.0, < 20.1.11
Version: >= 21.0.0, < 21.0.4
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45264",
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                  },
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                  },
                  {
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-01T17:47:35.907468Z",
                "version": "2.0.3"
              },
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            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-01T17:47:41.930Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "vendor": "nextcloud",
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            {
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            },
            {
              "status": "affected",
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            },
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              "version": "\u003e= 19.0.0, \u003c 19.1.16"
            },
            {
              "status": "affected",
              "version": "\u003e= 20.0.0, \u003c 20.1.11"
            },
            {
              "status": "affected",
              "version": "\u003e= 21.0.0, \u003c 21.0.4"
            }
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CVE-2026-44515 (GCVE-0-2026-44515)
Vulnerability from cvelistv5
Published
2026-05-14 16:36
Modified
2026-05-14 21:32
Severity ?
2.3 (Low) - CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Summary
Nextcloud News is an RSS/Atom feed reader. Prior to 28.3.0-beta.1, Nextcloud News allows authenticated users to add feeds by providing a feed URL (via the web interface or the API). In affected versions, an authenticated attacker could provide a URL pointing to internal/private IP ranges or localhost, causing the Nextcloud server to perform server-side HTTP requests to attacker-controlled destinations, but not relaying the result. This enables blind SSRF, which can be used to scan or probe internal network services that are reachable from the Nextcloud server. This vulnerability is fixed in 28.3.0-beta.1.
References
Impacted products
Vendor Product Version
nextcloud news Version: < 28.3.0-beta.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2025-66558 (GCVE-0-2025-66558)
Vulnerability from cvelistv5
Published
2025-12-05 18:00
Modified
2025-12-05 18:35
Severity ?
3.1 (Low) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud Twofactor WebAuthn is the WebAuthn Two-Factor Provider for Nextcloud. Prior to 1.4.2 and 2.4.1, a missing ownership check allowed an attack to take-away a 2FA webauthn device when correctly guessing a 80-128 character long random string of letters, numbers and symbols. The victim would then be prompted to register a new device on the next login. The attacker can not authenticate as the victim. This vulnerability is fixed in 1.4.2 and 2.4.1.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 1.4.2
Version: >= 2.0.0-beta.1, < 2.4.1
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2025-66556 (GCVE-0-2025-66556)
Vulnerability from cvelistv5
Published
2025-12-05 17:56
Modified
2025-12-05 18:09
Severity ?
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Summary
Nextcloud talk is a video & audio conferencing app for Nextcloud. Prior to 20.1.8 and 21.1.2, a participant with chat permissions was able to delete poll drafts of other participants within the conversation based on their numeric ID. This vulnerability is fixed in 20.1.8 and 21.1.2.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: < 20.1.8
Version: >= 21.0.0-beta.1, < 21.1.2
 Create a notification for this product.
Show details on NVD website

To clipboard 

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CVE-2025-66554 (GCVE-0-2025-66554)
Vulnerability from cvelistv5
Published
2025-12-05 17:50
Modified
2025-12-08 19:51
Severity ?
3.5 (Low) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
Contacts app for Nextcloud easily syncs contacts from various devices with your Nextcloud and allows editing. Prior to 5.5.4, 6.0.6, and 7.2.5, a malicious user was able to modify their organisation and title field to load additional CSS files. Javascript and other options were correctly blocked by the content security policy of the Nextcloud Server code. This vulnerability is fixed in 5.5.4, 6.0.6, and 7.2.5.
References
Impacted products
Vendor Product Version
nextcloud security-advisories Version: >= 7.0.0-alpha.1, < 7.2.5
Version: >= 6.0.0-alpha1, < 6.0.6
Version: < 5.5.4
 Create a notification for this product.
Show details on NVD website

To clipboard 

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          "name": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9v78-cpfc-v6h2"
        },
        {
          "name": "https://github.com/nextcloud/contacts/pull/4619",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/contacts/pull/4619"
        },
        {
          "name": "https://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nextcloud/contacts/commit/d954d098978dde1f121600e8b994e02f293c68b1"
        },
        {
          "name": "https://hackerone.com/reports/3293290",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://hackerone.com/reports/3293290"
        }
      ],
      "source": {
        "advisory": "GHSA-9v78-cpfc-v6h2",
        "discovery": "UNKNOWN"
      },
      "title": "Nextcloud Contacts vulnerable to Stored XSS in contacts app via organisation and title field"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-66554",
    "datePublished": "2025-12-05T17:50:59.860Z",
    "dateReserved": "2025-12-04T15:57:22.035Z",
    "dateUpdated": "2025-12-08T19:51:03.328Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}