Common Weakness Enumeration
CWE-204
AllowedObservable Response Discrepancy
Abstraction: Base · Status: Incomplete
The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere.
203 vulnerabilities reference this CWE, most recent first.
CVE-2026-107843 (GCVE-0-2026-107843)
Vulnerability from cvelistv5 – Published: 2026-10-09 19:21 – Updated: 2026-10-13 17:08
VLAI
EPSS
VEX
Title
Contao: The registration module re-sends activation mails on any unauthenticated POST, with no throttle and no captcha check
Summary
Contao is an Open Source CMS. From version 4.1.0 until 5.3.50 and 5.7.12, ModuleRegistration::compile() enters its follow-up registration branch on any POST to a page containing the registration module without verifying FORM_SUBMIT or the preceding captcha result. resendActivationMail() can then invoke OptInToken::send() without rate limiting, allowing an unauthenticated attacker to cause repeated activation emails to be sent to an address with a pending registration and to determine whether that pending registration exists. The branch is reachable only when reg_activate is enabled and the target has an unconfirmed registration and opt-in token. This issue is fixed in versions 5.3.50 and 5.7.12.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 17:08 UTC
CWE
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/contao/contao/security/advisor… | x_refsource_CONFIRM |
| https://github.com/contao/contao/commit/2ea6117f9… | x_refsource_MISC |
| https://github.com/contao/contao/releases/tag/5.3.50 | x_refsource_MISC |
| https://github.com/contao/contao/releases/tag/5.7.12 | x_refsource_MISC |
Impacted products
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CVE-2026-105664 (GCVE-0-2026-105664)
Vulnerability from cvelistv5 – Published: 2026-10-16 14:06 – Updated: 2026-10-16 15:20
VLAI
EPSS
VEX
Title
Guangzhou Juan IoT Technology EseeCloud Observable Response Discrepancy
Summary
The endpoint exposes an observable response discrepancy when processing ID values. A request submitted with a nonexistent ID returns a distinct error response code from one submitted with a valid, registered ID, allowing an attacker holding a valid access token - but without further authentication or authorization - to distinguish valid ID values from the full 10-digit numeric search space. Combined with the absence of meaningful rate limiting on this endpoint, this discrepancy constitutes an enumeration oracle, enabling an attacker to discover registered devices at scale.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:06 UTC
CWE
Assigner
icscert
CNA
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Guangzhou Juan IoT Technology Co., Ltd. | EseeCloud App |
Affected:
0 , ≤ 4.9.6
(custom)
|
|
| Guangzhou Juan IoT Technology Co., Ltd. | EseeCloud Firmware |
Affected:
0 , ≤ 4.9.86.0
(custom)
|
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CVE-2026-104439 (GCVE-0-2026-104439)
Vulnerability from cvelistv5 – Published: 2026-10-02 11:38 – Updated: 2026-10-02 13:31
VLAI
EPSS
VEX
Title
YesWiki before 4.6.7 User Enumeration via Lost-Password Flow
Summary
YesWiki before 4.6.7 contains a user enumeration vulnerability in LostPasswordAction.php that allows unauthenticated attackers to confirm registered email addresses through differing responses. Attackers can submit emails to the MotDePassePerdu recovery page without rate limiting to identify valid accounts for targeted phishing or password-spraying.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 13:31 UTC
CWE
- CWE-204 - Observable Response Discrepancy
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/YesWiki/yeswiki/security/advis… | vendor-advisory |
| https://www.vulncheck.com/advisories/yeswiki-befo… | third-party-advisory |
Impacted products
Date Public
2026-08-31 00:00
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CVE-2026-102587 (GCVE-0-2026-102587)
Vulnerability from cvelistv5 – Published: 2026-09-30 08:36 – Updated: 2026-09-30 15:28
VLAI
EPSS
VEX
Title
Moodle: user list filters bypass profile field visibility
Summary
A flaw was found in Moodle. User list filters do not properly enforce visibility restrictions on user profile fields. An authorized user with manager privileges can filter user lists using profile attributes they are not permitted to view directly, resulting in unauthorized information disclosure by inferring hidden user data.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:56 UTC
CWE
- CWE-204 - Observable Response Discrepancy
Assigner
fedora
CNA
References
4 references
| URL | Tags |
|---|---|
| http://git.moodle.org/gw?p=moodle.git&a=search&h=… | |
| https://access.redhat.com/security/cve/CVE-2026-102587 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2543642 | issue-trackingx_refsource_REDHAT |
| https://moodle.org/mod/forum/discuss.php?d=482506 |
Impacted products
Date Public
2026-09-29 20:17
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CVE-2026-100362 (GCVE-0-2026-100362)
Vulnerability from cvelistv5 – Published: 2026-11-05 18:44 – Updated: 2026-11-09 17:44
VLAI
EPSS
VEX
Title
SuiteCRM: V8 OAuth2 Username Enumeration
Summary
SuiteCRM is an open-source, enterprise-ready Customer Relationship Management (CRM) software application. Prior to 7.15.2 and 8.10.2, the /legacy/Api/V8/OAuth2 password-grant endpoint returns distinct error messages for an invalid username and an invalid password. An unauthenticated remote attacker can use those response differences to enumerate valid CRM usernames and target confirmed accounts with password spraying, credential stuffing, brute-force, or social-engineering attacks. This issue is fixed in versions 7.15.2 and 8.10.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 17:38 UTC
CWE
- CWE-204 - Observable Response Discrepancy
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/SuiteCRM/SuiteCRM/security/adv… | x_refsource_CONFIRM |
| https://github.com/SuiteCRM/SuiteCRM-Core/commit/… | x_refsource_MISC |
| https://github.com/SuiteCRM/SuiteCRM/commit/d6bca… | x_refsource_MISC |
| https://github.com/SuiteCRM/SuiteCRM-Core/release… | x_refsource_MISC |
| https://github.com/SuiteCRM/SuiteCRM/releases/tag… | x_refsource_MISC |
Impacted products
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CVE-2026-100164 (GCVE-0-2026-100164)
Vulnerability from cvelistv5 – Published: 2026-10-27 12:03 – Updated: 2026-11-04 16:52
VLAI
EPSS
VEX
Title
User Enumeration in Rolantis Information Technologies' Agentis
Summary
Observable response discrepancy vulnerability in Rolantis Information Technologies Tourism Industry and Trade Co. Ltd. Agentis allows Account Footprinting.
This issue affects Agentis: before 4.8.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 16:51 UTC
CWE
- CWE-204 - Observable response discrepancy
Assigner
TR-CERT
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://siberguvenlik.gov.tr/guvenlik-bildirimler… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Rolantis Information Technologies Tourism Industry and Trade Co. Ltd. | Agentis |
Affected:
0 , < 4.8
(custom)
|
Date Public
2026-10-27 12:01
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CVE-2026-97702 (GCVE-0-2026-97702)
Vulnerability from cvelistv5 – Published: 2026-11-04 22:51 – Updated: 2026-11-09 22:02
VLAI
EPSS
VEX
Title
Open edX: Support "manage_course_team" REST API omits the `require_support_permission` gate its sibling support views enforce
Summary
Open edX Platform enables the authoring and delivery of online learning at any scale. From the Ulmo release until release/ulmo.4 and release/verawood.1, the GET /api/support/v1/manage_course_team/ endpoint in CourseTeamManageAPIView requires only IsAuthenticated and omits the global support-role authorization check intended for this help-desk surface. Any authenticated learner can supply an email, username, or user_id for an arbitrary target and use the 200 and 404 response discrepancy to distinguish an active account from an absent or inactive account. A caller with a course-level or organization-level instructor role can additionally obtain the target user's staff or instructor assignments within the caller's course or organization scope. Anonymous callers remain blocked, and the separately authorized PUT behavior is outside this vulnerability. This issue is fixed in release/ulmo.4 and release/verawood.1.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 22:00 UTC
Assigner
GitHub_M
CNA
References
6 references
| URL | Tags |
|---|---|
| https://github.com/openedx/openedx-platform/secur… | x_refsource_CONFIRM |
| https://github.com/openedx/openedx-platform/commi… | x_refsource_MISC |
| https://github.com/openedx/openedx-platform/commi… | x_refsource_MISC |
| https://github.com/openedx/openedx-platform/relea… | x_refsource_MISC |
| https://github.com/openedx/openedx-platform/relea… | x_refsource_MISC |
| https://github.com/wazuh/wazuh/security/advisorie… | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| openedx | openedx-platform |
Affected:
>= release/ulmo, < release/ulmo.4
Affected: >= release/verawood, < release/verawood.1 |
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CVE-2026-89173 (GCVE-0-2026-89173)
Vulnerability from cvelistv5 – Published: 2026-09-11 07:27 – Updated: 2026-09-11 16:18
VLAI
EPSS
VEX
Title
Kingdom Communication Associated｜Smart Video Intercom System - Sensitive Data Exposure
Summary
Smart Video Intercom System developed by Kingdom Communication Associated has a Sensitive Data Exposure vulnerability. Unauthenticated remote attackers can enumerate valid user accounts by exploiting differences in system responses.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 16:18 UTC
CWE
- CWE-204 - Response Discrepancy Information Exposure
Assigner
twcert
CNA
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-11198-b8bba-1.html | third-party-advisory |
| https://www.twcert.org.tw/en/cp-139-11199-38e1e-2.html | third-party-advisory |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Kingdom Communication Associated | EH3040 |
Affected:
0 , < 2.5.0A
(custom)
|
|
| Kingdom Communication Associated | EH4200 |
Affected:
0 , < 2.5.0A
(custom)
|
|
| Kingdom Communication Associated | EH1000B |
Affected:
0 , < 2.7.0A
(custom)
|
|
| Kingdom Communication Associated | EH2070 |
Affected:
0 , < 2.8.0A
(custom)
|
Date Public
2026-09-11 07:23
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CVE-2026-86778 (GCVE-0-2026-86778)
Vulnerability from cvelistv5 – Published: 2026-09-30 12:59 – Updated: 2026-09-30 14:26
VLAI
EPSS
VEX
Title
Username Enumeration in Maksisoft Technology's Maksisoft Gym
Summary
Observable response discrepancy vulnerability in Maksisoft Technology, IT, and Software Industry and Trade Inc. Maksisoft Gym allows Account Footprinting.
This issue affects Maksisoft Gym: from 0.5.10 before 0.5.11.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 14:26 UTC
CWE
- CWE-204 - Observable response discrepancy
Assigner
TR-CERT
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://siberguvenlik.gov.tr/guvenlik-bildirimler… | government-resource |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Maksisoft Technology, IT, and Software Industry and Trade Inc. | Maksisoft Gym |
Affected:
0.5.10 , < 0.5.11
(semver)
|
Date Public
2026-09-30 12:54
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CVE-2026-86758 (GCVE-0-2026-86758)
Vulnerability from cvelistv5 – Published: 2026-09-09 13:32 – Updated: 2026-09-09 14:29
VLAI
EPSS
VEX
Title
Snipe-IT before 8.7.0 License Key Exposure via CSV Export
Summary
Snipe-IT before 8.7.0 fails to properly enforce the viewKeys authorization gate in CSV export and API index endpoints, allowing authenticated users with only licenses.view permission to access product keys. Attackers can download all license keys in bulk via CSV export or validate candidate keys through API response discrepancies without needing the viewKeys permission.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 14:28 UTC
CWE
- CWE-204 - Observable Response Discrepancy
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/grokability/snipe-it/security/… | vendor-advisory |
| https://www.vulncheck.com/advisories/snipe-it-bef… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| grokability | snipe-it |
Affected:
0 , < 8.7.0
(semver)
Unaffected: 8.7.0 (semver) cpe:2.3:a:snipeitapp:snipe-it:*:*:*:*:*:*:*:* |
Date Public
2026-08-24 00:00
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Mitigation MIT-46
Architecture and Design
Strategy: Separation of Privilege
- Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Mitigation MIT-39
Implementation
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
CAPEC-331: ICMP IP Total Length Field Probe
An adversary sends a UDP packet to a closed port on the target machine to solicit an IP Header's total length field value within the echoed 'Port Unreachable" error message. This type of behavior is useful for building a signature-base of operating system responses, particularly when error messages contain other types of information that is useful identifying specific operating system responses.
CAPEC-332: ICMP IP 'ID' Field Error Message Probe
An adversary sends a UDP datagram having an assigned value to its internet identification field (ID) to a closed port on a target to observe the manner in which this bit is echoed back in the ICMP error message. This allows the attacker to construct a fingerprint of specific OS behaviors.
CAPEC-541: Application Fingerprinting
An adversary engages in fingerprinting activities to determine the type or version of an application installed on a remote target.
CAPEC-580: System Footprinting
An adversary engages in active probing and exploration activities to determine security information about a remote target system. Often times adversaries will rely on remote applications that can be probed for system configurations.