Common Weakness Enumeration

CWE-287

Discouraged

Improper Authentication

Abstraction: Class · Status: Draft

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

2085 vulnerabilities reference this CWE, most recent first.

CVE-2026-86426 (GCVE-0-2026-86426)

Vulnerability from cvelistv5 – Published: 2026-09-07 12:53 – Updated: 2026-09-08 13:39
VLAI
Title
LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion
Summary
LibreNMS before 26.8.0 contains an authentication bypass vulnerability in the REST API that allows unauthenticated attackers to access protected endpoints by sending numeric values instead of string tokens. Attackers can exploit MySQL type coercion by sending small integers like 0 through 9 to match token hashes, gaining access to API functionality including device credentials and administrative features that enable remote code execution through alert templates.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 13:38 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
librenms librenms Affected: 0 , < 26.8.0 (semver)
Unaffected: 26.8.0 (semver)
    cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-23 00:00
Credits
Show details on NVD website

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CVE-2026-86400 (GCVE-0-2026-86400)

Vulnerability from cvelistv5 – Published: 2026-10-28 08:50 – Updated: 2026-10-30 17:18
VLAI
Summary
Dell PowerProtect Data Domain, Feature Release versions 7.7.1.0 through 8.8, LTS2024 release versions 7.13.1.0 through 7.13.1.80, LTS2025 release versions 8.3.1.0 through 8.3.1.40, LTS2026 release versions 8.6.1.0 through 8.6.1.20, contain an Improper Authentication vulnerability. An unauthenticated attacker with remote access could potentially exploit this vulnerability, leading to arbitrary command execution with root privileges. This is a critical severity vulnerability as it allows an attacker to take complete control of the system. Dell recommends customers to upgrade at the earliest opportunity.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 03:56 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
dell CNA
References
Impacted products
Vendor Product Version
Dell PowerProtect Data Domain Affected: 0 , < 8.9.0.0 or later (semver)
Affected: 0 , < 7.13.1.90 or later (semver)
Affected: 0 , < 8.3.1.50 or later (semver)
Affected: 0 , < 8.6.1.30 or later (semver)
Create a notification for this product.
Date Public
2026-10-01 06:30
Show details on NVD website

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CVE-2026-86306 (GCVE-0-2026-86306)

Vulnerability from cvelistv5 – Published: 2026-09-07 13:00 – Updated: 2026-09-08 15:06
VLAI
Title
light0011 cms Cookie Helper UserModel.class.php improper authentication
Summary
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SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 15:06 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/399479 vdb-entrytechnical-description
https://vuldb.com/vuln/399479/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86306 third-party-advisory
https://vuldb.com/submit/894817 third-party-advisory
https://github.com/light0011/cms/issues/11 exploitissue-tracking
https://github.com/light0011/cms/ product
Impacted products
Vendor Product Version
light0011 cms Affected: c774dce31c6df0055568a8d5c53d964d99be199d
Affected: f72cf46f601efb2a0618c3814cc2f61380b38930
    cpe:2.3:a:light0011:cms:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-86300 (GCVE-0-2026-86300)

Vulnerability from cvelistv5 – Published: 2026-09-07 11:30 – Updated: 2026-09-08 15:03
VLAI
Title
Tenda AC9 Web Management R7WebsSecurityHandler improper authentication
Summary
A flaw has been found in Tenda AC9 15.03.05.14. This impacts the function R7WebsSecurityHandler of the component Web Management. This manipulation causes improper authentication. The attack may be initiated remotely. The exploit has been published and may be used.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 15:03 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulDB CNA
Impacted products
Vendor Product Version
Tenda AC9 Affected: 15.03.05.14
    cpe:2.3:o:tenda:ac9_firmware:*:*:*:*:*:*:*:*
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Show details on NVD website

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CVE-2026-86293 (GCVE-0-2026-86293)

Vulnerability from cvelistv5 – Published: 2026-09-07 09:45 – Updated: 2026-09-08 13:40 X_Freeware
VLAI
Title
SourceCodester Simple Traffic Offense System Deletion Endpoint delete-user.php missing authentication
Summary
A flaw has been found in SourceCodester Simple Traffic Offense System 1.0. Affected by this vulnerability is an unknown functionality of the file delete-user.php of the component Deletion Endpoint. Executing a manipulation of the argument ID can lead to missing authentication. The attack may be launched remotely. The exploit has been published and may be used.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 13:40 UTC
CWE
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/399455 vdb-entrytechnical-description
https://vuldb.com/vuln/399455/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86293 third-party-advisory
https://vuldb.com/submit/906278 third-party-advisory
https://github.com/tan1540684326-QAQ/cve/issues/2 exploitissue-tracking
https://www.sourcecodester.com/ product
Impacted products
Vendor Product Version
SourceCodester Simple Traffic Offense System Affected: 1.0
    cpe:2.3:a:sourcecodester:simple_traffic_offense_system:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-86292 (GCVE-0-2026-86292)

Vulnerability from cvelistv5 – Published: 2026-09-07 09:30 – Updated: 2026-09-09 14:21 X_Freeware
VLAI
Title
SourceCodester Simple Traffic Offense System User Creation saveuser.php missing authentication
Summary
A vulnerability was detected in SourceCodester Simple Traffic Offense System 1.0. Affected is an unknown function of the file saveuser.php of the component User Creation. Performing a manipulation of the argument position results in missing authentication. The attack may be initiated remotely. The exploit is now public and may be used.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 14:21 UTC
CWE
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/399454 vdb-entrytechnical-description
https://vuldb.com/vuln/399454/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86292 third-party-advisory
https://vuldb.com/submit/906272 third-party-advisory
https://github.com/tan1540684326-QAQ/cve/issues/1 exploitissue-tracking
https://www.sourcecodester.com/ product
Impacted products
Vendor Product Version
SourceCodester Simple Traffic Offense System Affected: 1.0
    cpe:2.3:a:sourcecodester:simple_traffic_offense_system:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-86249 (GCVE-0-2026-86249)

Vulnerability from cvelistv5 – Published: 2026-10-21 12:17 – Updated: 2026-10-30 17:05
VLAI
Title
Apache bRPC: Authentication bypass when a server sets ServerOptions.internal_port and ServerOptions.auth
Summary
On a brpc::Server that sets both ServerOptions.auth and ServerOptions.internal_port, the HTTP built-in service exemption on internal_port can be abused to bypass authentication entirely. VerifyHttpRequest() returns true without checking any credential when a built-in service is requested on internal_port, and this verdict is not per - request: verification runs only for the first message of a connection and the result latches the connection. Sending a request such as GET /status to internal_port first authenticates the whole connection, after which every subsequent request dispatched on the same connection is handled without ever calling VerifyHttpRequest(). This lets a remote attacker reach ordinary (non-built-in, non-tabbed) authenticated services without supplying valid credentials whenever the server uses ServerOptions.internal_port together with an Authenticator. The fix restricts internal_port so that it carries only built-in and Tabbed services; requests for ordinary services sent to internal_port are rejected with EPREM / HTTP 403.  Mitigation / Fix: upgrade to 1.18.0 or apply PR https://github.com/apache/brpc/pull/3525 .  Users who rely on serving normal services on internal_port must move those requests to the port passed to Server::Start().
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 17:05 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
apache CNA
Impacted products
Vendor Product Version
Apache Software Foundation Apache bRPC Affected: 0 , < 1.18.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-86214 (GCVE-0-2026-86214)

Vulnerability from cvelistv5 – Published: 2026-09-06 13:00 – Updated: 2026-09-08 15:05
VLAI
Title
Mstfakts College-Management-System login.php improper authentication
Summary
A vulnerability was determined in Mstfakts College-Management-System. Impacted is an unknown function of the file Front-end/login.php. This manipulation of the argument email causes improper authentication. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. This product is using a rolling release to provide continious delivery. Therefore, no version details for affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 15:04 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulDB CNA
References
URL Tags
https://vuldb.com/vuln/399350 vdb-entrytechnical-description
https://vuldb.com/vuln/399350/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-86214 third-party-advisory
https://vuldb.com/submit/897250 third-party-advisory
https://github.com/Mstfakts/College-Management-Sy… exploitissue-tracking
Impacted products
Vendor Product Version
n/a Mstfakts College-Management-System Affected: 82ab01d057d96c8893c419cd9cb6870120faaea3
Affected: a37300648b6e50d43a2f10392ad741d199635daf
Affected: c81bbedea4d9e0b860ac368aa1dbb10e55ceddce
    cpe:2.3:a:mstfakts_college-management-system:mstfakts_college-management-system:*:*:*:*:*:*:*:*
Show details on NVD website

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CVE-2026-86117 (GCVE-0-2026-86117)

Vulnerability from cvelistv5 – Published: 2026-09-05 09:59 – Updated: 2026-09-24 14:21
VLAI
Title
Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching
Summary
Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any enabled OAuth provider to obtain authenticated sessions as that user, bypassing password requirements and two-factor authentication.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 14:24 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulnCheck CNA
Impacted products
Vendor Product Version
coollabsio coolify Affected: 0 , ≤ 4.3.17 (semver)
    cpe:2.3:a:coollabs:coolify:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-04 00:00
Show details on NVD website

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CVE-2026-85984 (GCVE-0-2026-85984)

Vulnerability from cvelistv5 – Published: 2026-09-26 17:28 – Updated: 2026-09-26 22:51
VLAI
Title
miniOrange OTP Login, Verification and SMS Notifications <= 5.5.5 - Unauthenticated Authentication Bypass via 'mo_wp_login_intent' Parameter
Summary
The miniOrange OTP Login, Verification and SMS Notifications plugin for WordPress is vulnerable to Authentication Bypass via the mo_wp_login_intent parameter in all versions up to, and including, 5.5.5. This is due to a missing password-intent guard in the skip_pass_fallback-enabled configuration branch of the mo_by_pass_login() function, which treats administrator role membership alone as sufficient authentication whenever the unauthenticated, unverified POST parameter mo_wp_login_intent is submitted with the value otp, causing mo_get_user() to skip wp_authenticate_username_password() and resolve a WP_User purely from a username lookup. This makes it possible for unauthenticated attackers to log in as any existing administrator account by supplying only a known username and an empty password alongside mo_wp_login_intent=otp, with no password or OTP verification required. Exploitation is conditional on a site administrator having simultaneously enabled the following plugin options: WP Login OTP, Login with Only OTP, Allow Users to Login with Username and Password, and Admin OTP Bypass.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-26 22:44 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
Wordfence CNA
Impacted products
Show details on NVD website

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          "value": "The miniOrange OTP Login, Verification and SMS Notifications plugin for WordPress is vulnerable to Authentication Bypass via the mo_wp_login_intent parameter in all versions up to, and including, 5.5.5. This is due to a missing password-intent guard in the skip_pass_fallback-enabled configuration branch of the mo_by_pass_login() function, which treats administrator role membership alone as sufficient authentication whenever the unauthenticated, unverified POST parameter mo_wp_login_intent is submitted with the value otp, causing mo_get_user() to skip wp_authenticate_username_password() and resolve a WP_User purely from a username lookup. This makes it possible for unauthenticated attackers to log in as any existing administrator account by supplying only a known username and an empty password alongside mo_wp_login_intent=otp, with no password or OTP verification required. Exploitation is conditional on a site administrator having simultaneously enabled the following plugin options: WP Login OTP, Login with Only OTP, Allow Users to Login with Username and Password, and Admin OTP Bypass."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287 Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-26T17:28:59.138Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2895f0c2-41b6-4b11-9865-3bded4402aa9?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/miniorange-otp-verification/tags/5.5.5/views/forms/mowploginform.php#L134"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/miniorange-otp-verification/tags/5.5.5/includes/js/loginform.js#L176"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3687601/miniorange-otp-verification"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-09-04T19:32:55.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-09-26T04:44:50.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "miniOrange OTP Login, Verification and SMS Notifications \u003c= 5.5.5 - Unauthenticated Authentication Bypass via \u0027mo_wp_login_intent\u0027 Parameter"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-85984",
    "datePublished": "2026-09-26T17:28:59.138Z",
    "dateReserved": "2026-09-04T19:17:29.094Z",
    "dateUpdated": "2026-09-26T22:51:17.200Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Mitigation
Architecture and Design

Strategy: Libraries or Frameworks

Use an authentication framework or library such as the OWASP ESAPI Authentication feature.

CAPEC-114: Authentication Abuse

An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker.

CAPEC-115: Authentication Bypass

An attacker gains access to application, service, or device with the privileges of an authorized or privileged user by evading or circumventing an authentication mechanism. The attacker is therefore able to access protected data without authentication ever having taken place.

CAPEC-151: Identity Spoofing

Identity Spoofing refers to the action of assuming (i.e., taking on) the identity of some other entity (human or non-human) and then using that identity to accomplish a goal. An adversary may craft messages that appear to come from a different principle or use stolen / spoofed authentication credentials.

CAPEC-194: Fake the Source of Data

An adversary takes advantage of improper authentication to provide data or services under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or to assume the rights granted to another individual. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. The root of the attack (in this case the email system) fails to properly authenticate the source and this results in the reader incorrectly performing the instructed action. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.

CAPEC-22: Exploiting Trust in Client

An attack of this type exploits vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by communicating directly with the server where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.

CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data

This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to obtain sensitive data once SSL is terminated.

CAPEC-593: Session Hijacking

This type of attack involves an adversary that exploits weaknesses in an application's use of sessions in performing authentication. The adversary is able to steal or manipulate an active session and use it to gain unathorized access to the application.

CAPEC-633: Token Impersonation

An adversary exploits a weakness in authentication to create an access token (or equivalent) that impersonates a different entity, and then associates a process/thread to that that impersonated token. This action causes a downstream user to make a decision or take action that is based on the assumed identity, and not the response that blocks the adversary.

CAPEC-650: Upload a Web Shell to a Web Server

By exploiting insufficient permissions, it is possible to upload a web shell to a web server in such a way that it can be executed remotely. This shell can have various capabilities, thereby acting as a "gateway" to the underlying web server. The shell might execute at the higher permission level of the web server, providing the ability the execute malicious code at elevated levels.

CAPEC-94: Adversary in the Middle (AiTM)

An adversary targets the communication between two components (typically client and server), in order to alter or obtain data from transactions. A general approach entails the adversary placing themself within the communication channel between the two components.