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.

6984 vulnerabilities reference this CWE, most recent first.

CVE-2026-75957 (GCVE-0-2026-75957)

Vulnerability from cvelistv5 – Published: 2026-10-01 07:40 – Updated: 2026-10-01 13:42
VLAI
Title
Ultimate Multisite <= 2.15.0 - Unauthenticated Authentication Bypass via 'checkout_form' Parameter
Summary
The Ultimate Multisite – WordPress Multisite SaaS & WaaS Platform plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.15.0 via the `checkout_form` parameter of the `login_customer_after_checkout` function. This is due to the publicly accessible `wu_ajax_nopriv_wu_validate_form` AJAX handler accepting a freely obtainable checkout nonce, and the `checkout_form=wu-finish-checkout` parameter causing `get_validation_rules()` to discard all validation rules while `finish_checkout_form_fields()` returns an empty step list — forcing `is_last_step()` to return true and routing the request directly into full order processing — after which `maybe_create_customer()` resolves the attacker-supplied `email_address` to an existing WordPress user ID without any authentication or ownership verification, and `login_customer_after_checkout()` calls `wp_set_auth_cookie()` for that user ID via a passwordless code path. This makes it possible for unauthenticated attackers to log in as any existing WordPress user — including a Network Super Admin — simply by knowing their email address. Exploitation requires that the targeted user account has no pre-existing Ultimate Multisite customer record; accounts such as a Network Super Admin on a fresh Multisite install, or any administrator or editor added before Ultimate Multisite was configured, satisfy this condition and are therefore exploitable.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 13:40 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2304 records in the last 180 days details
Impacted products
Credits
Show details on NVD website

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CVE-2026-75903 (GCVE-0-2026-75903)

Vulnerability from cvelistv5 – Published: 2026-10-16 07:44 – Updated: 2026-10-16 15:09
VLAI
Title
Vulnity Security <= 1.4.3 - Unauthenticated Authentication Bypass to Administrator via Exposed Pairing Credentials
Summary
The Vulnity Security plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including, 1.4.3 This is due to insufficient protection of the delegated-login pairing credential file on Nginx-based installations, where the plugin's generated server configuration snippet guards the wrong directory path. This makes it possible for unauthenticated attackers to retrieve the stored credentials, forge signed REST API requests, and log in as an administrator.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 14:54 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2304 records in the last 180 days details
Impacted products
Vendor Product Version
manuelgalan Vulnity Security Affected: 0 , ≤ 1.4.3 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-75878 (GCVE-0-2026-75878)

Vulnerability from cvelistv5 – Published: 2026-09-18 19:22 – Updated: 2026-09-19 14:11
VLAI
Title
IBM Sterling File Gateway is Vulnerable to Authentication Bypass
Summary
IBM Sterling File Gateway could allow a remote attacker to bypass authentication and obtain a fully authenticated session due to improper authentication via an unvalidated SSO header.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-19 13:37 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
ibm CNA under the mitre root
CNA scorecard B 88/100 over 1251 records in the last 180 days details
References
URL Tags
https://www.ibm.com/support/pages/node/7287497 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Sterling File Gateway Affected: 6.2.0.0 , ≤ 6.2.0.6_1, 6.2.1.0 - 6.2.1.2, 6.2.2.0 - 6.2.2.1 (semver)
    cpe:2.3:a:ibm:sterling_file_gateway:6.2.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:sterling_file_gateway:6.2.0.6_1:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-75816 (GCVE-0-2026-75816)

Vulnerability from cvelistv5 – Published: 2026-09-06 02:26 – Updated: 2026-09-07 11:17
VLAI
Title
Frontend Admin by DynamiApps <= 3.29.12 - Unauthenticated Account Takeover via '_acf_objects' Object Identifier
Summary
The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to Authentication Bypass to Account Takeover in all versions up to, and including, 3.29.12. This is due to the pre_update_value function lacking any capability or ownership check, and ActionPost::conditions_logic() short-circuiting its current_user_can('edit_post') authorization gate whenever the post ID is non-numeric — such as the string user_1 — allowing unauthenticated form submissions to be routed to arbitrary user records without restriction. This makes it possible for unauthenticated attackers to overwrite any user's registered email address, including an administrator's, and then leverage WordPress's native password-reset flow to fully take over the targeted account.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-07 11:02 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2304 records in the last 180 days details
Impacted products
Vendor Product Version
shabti Frontend Admin by DynamiApps Affected: 0 , ≤ 3.29.12 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-75807 (GCVE-0-2026-75807)

Vulnerability from cvelistv5 – Published: 2026-08-29 17:25 – Updated: 2026-08-31 18:10
VLAI
Title
SAML Single Sign On <= 5.4.6 - Unauthenticated Authentication Bypass via X.509 Certificate Poisoning
Summary
The SAML Single Sign On – SSO Login plugin for WordPress is vulnerable to Authentication Bypass in versions up to, and including, 5.4.6. This is due to the mo_saml_login_validate() ACS handler persisting the X.509 certificate extracted from an incoming SAMLResponse into the mo_saml_required_certificate option before the signature-validation verdict is enforced, because mo_saml_find_certificate() returns false on a fingerprint mismatch rather than halting execution. This makes it possible for unauthenticated attackers to overwrite the plugin's stored IdP signing certificate with an attacker-controlled value, and subsequently forge SAML assertions for any WordPress account — including administrators — to obtain a fully privileged session. Note: The exploit requires the administrator to perform a repair after receiving the test_config_error_wpsamlerr004 error message during the test configuration.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 18:04 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
Wordfence CNA under the mitre root
CNA scorecard C 65/100 over 2304 records in the last 180 days details
Impacted products
Vendor Product Version
cyberlord92 SAML Single Sign On – SSO Login Affected: 0 , ≤ 5.4.6 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-75774 (GCVE-0-2026-75774)

Vulnerability from cvelistv5 – Published: 2026-08-18 11:15 – Updated: 2026-08-18 13:59
VLAI
Title
karakeep-app karakeep OAuth Sign-In auth.ts improper authentication
Summary
A vulnerability was determined in karakeep-app karakeep up to 0.32.0. The impacted element is an unknown function of the file apps/web/server/auth.ts of the component OAuth Sign-In. This manipulation causes improper authentication. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is regarded as difficult. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 13:55 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulDB CNA under the mitre root
CNA scorecard B 82/100 over 3826 records in the last 180 days details
References
Impacted products
Vendor Product Version
karakeep-app karakeep Affected: 0.1
Affected: 0.2
Affected: 0.3
Affected: 0.4
Affected: 0.5
Affected: 0.6
Affected: 0.7
Affected: 0.8
Affected: 0.9
Affected: 0.10
Affected: 0.11
Affected: 0.12
Affected: 0.13
Affected: 0.14
Affected: 0.15
Affected: 0.16
Affected: 0.17
Affected: 0.18
Affected: 0.19
Affected: 0.20
Affected: 0.21
Affected: 0.22
Affected: 0.23
Affected: 0.24
Affected: 0.25
Affected: 0.26
Affected: 0.27
Affected: 0.28
Affected: 0.29
Affected: 0.30
Affected: 0.31
Affected: 0.32.0
    cpe:2.3:a:karakeep-app:karakeep:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-74894 (GCVE-0-2026-74894)

Vulnerability from cvelistv5 – Published: 2026-08-17 11:04 – Updated: 2026-10-01 15:21
VLAI
Title
openssl_encrypt before 1.4.0 Authentication Bypass via Bearer Token
Summary
openssl_encrypt before 1.4.0 contains an authentication bypass vulnerability in the verify_api_token function that accepts any non-empty Bearer token string without validation. Attackers can upload arbitrary public keys, enumerate all keys, and revoke keys belonging to any user by providing any Bearer token in the Authorization header.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 16:00 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6438 records in the last 180 days details
References
Impacted products
Vendor Product Version
jahlives openssl_encrypt Affected: 0 , < 1.4.0 (semver)
Unaffected: 1.4.0 (semver)
    cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:*:*:*
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Date Public
2026-02-10 00:00
Show details on NVD website

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CVE-2026-74240 (GCVE-0-2026-74240)

Vulnerability from cvelistv5 – Published: 2026-08-14 22:43 – Updated: 2026-08-20 14:12
VLAI
Title
Quay: jwt claim validation bypasses in quay federated robot and sso authentication
Summary
A flaw was found in Red Hat Quay's JWT (JSON Web Token) validation for federated robot accounts and single sign-on (SSO) authentication. Multiple issues related to audience verification and the enforcement of `azp` and `sub` claims were identified. These flaws could allow an attacker with a validly-signed token from the same identity provider to bypass configured security restrictions. This bypass could lead to unauthorized access by circumventing intended audience, subject, or authorized-client limitations.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:11 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1036 records in the last 180 days details
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-74240 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2516139 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat OpenShift Update Service     cpe:/a:redhat:openshift_update_service:5
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Red Hat Red Hat Quay 3     cpe:/a:redhat:quay:3
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Date Public
2026-08-14 00:00
Show details on NVD website

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CVE-2026-73840 (GCVE-0-2026-73840)

Vulnerability from cvelistv5 – Published: 2026-08-13 21:52 – Updated: 2026-08-14 16:26
VLAI
Title
OpenChoreo: Unauthenticated build/workflow trigger via git-provider confusion (webhook signature bypass)
Summary
OpenChoreo is a complete, open-source developer platform for Kubernetes. Prior to 1.0.3, 1.1.3, and 1.2.0-rc.2, the POST /api/v1alpha1/autobuild endpoint in internal/openchoreo-api/api/handlers/webhook_handler.go selected a webhook provider from caller-controlled X-Event-Key, accepted Bitbucket requests without HMAC-SHA256 in X-Hub-Signature or a configured bitbucket-secret, and allowed unauthenticated build triggers for components matched by repository URL and branch, including cross-provider triggers using attacker-supplied commit SHAs. This issue is fixed in versions 1.0.3, 1.1.3, and 1.2.0-rc.2.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:25 UTC
CWE
  • CWE-287 - Improper Authentication
  • CWE-290 - Authentication Bypass by Spoofing
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7702 records in the last 180 days details
Impacted products
Vendor Product Version
openchoreo openchoreo Affected: < 1.0.3
Affected: >= 1.1.0, < 1.1.3
Affected: >= 1.2.0-rc.1, < 1.2.0-rc.2
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Show details on NVD website

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CVE-2026-73655 (GCVE-0-2026-73655)

Vulnerability from cvelistv5 – Published: 2026-08-13 19:53 – Updated: 2026-08-18 01:36
VLAI
Title
Trigger.dev: Account Takeover via Cross-Provider OAuth Email Matching in Google Login
Summary
Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. Prior to 4.5.2, addGoogleStrategy() in apps/webapp/app/services/googleAuth.server.ts passes a Google profile email to findOrCreateGoogleUser() in apps/webapp/app/models/user.server.ts without requiring Google's email_verified assertion. When existingEmailUser && !existingUser is true, the flow writes the new Google authIdentifier into the existing email-matched account and returns that user object, allowing an attacker-controlled Google profile with an unverified matching email to take over the account. This issue is fixed in version 4.5.2.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 01:36 UTC
CWE
  • CWE-287 - Improper Authentication
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7702 records in the last 180 days details
Impacted products
Show details on NVD website

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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-73655",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-18T01:36:02.784608Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-18T01:36:28.213Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/triggerdotdev/trigger.dev/security/advisories/GHSA-rp8c-h4xr-w9qv"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "trigger.dev",
          "vendor": "triggerdotdev",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.5.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Trigger.dev is a platform for building and deploying fully managed AI agents and workflows. Prior to 4.5.2, addGoogleStrategy() in apps/webapp/app/services/googleAuth.server.ts passes a Google profile email to findOrCreateGoogleUser() in apps/webapp/app/models/user.server.ts without requiring Google\u0027s email_verified assertion. When existingEmailUser \u0026\u0026 !existingUser is true, the flow writes the new Google authIdentifier into the existing email-matched account and returns that user object, allowing an attacker-controlled Google profile with an unverified matching email to take over the account. This issue is fixed in version 4.5.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287: Improper Authentication",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T19:53:50.490Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/triggerdotdev/trigger.dev/security/advisories/GHSA-rp8c-h4xr-w9qv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/triggerdotdev/trigger.dev/security/advisories/GHSA-rp8c-h4xr-w9qv"
        },
        {
          "name": "https://github.com/triggerdotdev/trigger.dev/pull/4199",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/triggerdotdev/trigger.dev/pull/4199"
        },
        {
          "name": "https://github.com/triggerdotdev/trigger.dev/commit/34b1a181c2a1d33a53ebab88f84b05f81fea4254",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/triggerdotdev/trigger.dev/commit/34b1a181c2a1d33a53ebab88f84b05f81fea4254"
        },
        {
          "name": "https://github.com/triggerdotdev/trigger.dev/releases/tag/v4.5.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/triggerdotdev/trigger.dev/releases/tag/v4.5.2"
        }
      ],
      "source": {
        "advisory": "GHSA-rp8c-h4xr-w9qv",
        "discovery": "UNKNOWN"
      },
      "title": "Trigger.dev: Account Takeover via Cross-Provider OAuth Email Matching in Google Login"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-73655",
    "datePublished": "2026-08-13T19:53:50.490Z",
    "dateReserved": "2026-08-13T14:04:09.605Z",
    "dateUpdated": "2026-08-18T01:36:28.213Z",
    "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.