Weakness (CWE)
CWE-287: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How to prevent it (1 mitigation)
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Architecture and Design
Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Source: MITRE CWE-287
3,158 results · Feed
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Medium 6.8
Express Gateway through 1.16.11 OAuth 2.0 Refresh Token Validation Bypass
Express Gateway through 1.16.11 contains an authentication bypass vulnerability in the OAuth 2.0 refresh_token grant that fails to validate the token secret or issuing client. Attackers with any valid client credentials and the identifier portion of another u…
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High 7.7
wolfSSHd on Windows race condition leading to logon token reused across connections
When password or public key authentication is used with the Windows port of wolfSSHd, the Windows logon token acquired for one authenticated connection is not released before a token is acquired for a subsequent connection, resulting in user login poisoning b…
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Critical 9.1
Gitea OAuth2 refresh token grant accepts access tokens
Gitea's OAuth2 token endpoint verified the signature and grant of a token submitted with the `refresh_token` grant type, but not that the token was a refresh token. An unexpired access token for the same OAuth2 application and grant could be exchanged for a n…
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High 8.1
Backstage: Improper authentication in the OIDC provider
Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution…
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Medium 6.8
Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization
Backstage is an open framework for building developer portals. From 0.3.0 until 0.6.15 and 0.7.5, the @backstage/plugin-auth-node package did not consistently honor explicit negative email verification during shared OAuth profile normalization. The affected p…
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Medium 6.8
Backstage: Insufficient audience validation in the Cloudflare Access auth provider
Backstage is an open framework for building developer portals. From 0.1.0 until 0.5.0, the @backstage/plugin-auth-backend-module-cloudflare-access-provider package is affected by insufficient audience validation in the cloudflare access auth provider. The Clo…
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Critical 9.8
Gitea WebAuthn bypass during OAuth and OIDC sign-in
Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the pa…
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High 8.1
Gitea installer authentication bypass for existing accounts
When Gitea's web installer is reachable against a database that already contains users, such as after `INSTALL_LOCK` has been reset to `false`, submitting the install form with an administrator username matching an existing account issued an authenticated ses…
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Critical 9.8
Authentication Bypass Vulnerabilities in ClearPass Policy Manager
Vulnerabilities have been identified in the affected interface of ClearPass Policy Manager that could potentially allow an unauthenticated remote attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain …
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Critical 9.8
Authentication Bypass Vulnerabilities in HPE Networking ClearPass Policy Manager Allow Unauthorized Administrative Access
Authentication bypass vulnerabilities exist in the web-based management and API interfaces of HPE Networking ClearPass Policy Manager. Successful exploitation could allow an unauthenticated remote attacker to circumvent existing authentication controls and ga…
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Critical 9.8
Authentication Bypass Vulnerability in the Management Interface of AOS-S
A vulnerability have been identified in the management interface of AOS-S that could potentially allow an unauthenticated remote attacker to circumvent existing authentication controls if certain preconditions outside of the attacker's control are met. Succes…
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Medium 5.4
Keycloak-services: keycloak-services: device authorization grant bypasses per-client minimum.acr.value enforcement
A flaw was found in the OIDC implementation of Keycloak, specifically within the Device Authorization Grant flow. This component allows devices with limited input capabilities to obtain security tokens. The issue occurs because the flow fails to check the min…
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High 7.6CVE-2026-59358 Public exploit
UAA OAuth Token Endpoint Vulnerability allows user access token reuse for client_credentials grant type
Improper authentication (CWE-287) in the OAuth token endpoint in Cloud Foundry UAA allows a remote, authenticated attacker holding a valid user access token to obtain a fully-privileged client_credentials token for the OAuth client that issued it, by presenti…
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Medium 5.3
Deema Payment Gateway <= 1.1.2 - Unauthenticated Payment Bypass and Order Manipulation via Webhook
The Deema Payment Gateway WordPress plugin through 1.1.2 does not verify the authenticity of incoming payment provider notifications, and ships with that verification disabled by default, allowing unauthenticated attackers to mark an unpaid order as paid, or …
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Medium 5.3
Deema Payment Gateway <= 1.1.2 - Unauthenticated Payment Confirmation Forgery via Unverified Success Return
The Deema Payment Gateway WordPress plugin through 1.1.2 does not verify the payment with the payment provider when handling the return from the hosted checkout, and does not check the payment status or amount, allowing unauthenticated users to have orders ma…
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High 7.3
SourceCodester Drug Recommendation System Auth Guard improper authentication
A vulnerability was identified in SourceCodester Drug Recommendation System 1.0. This affects an unknown function of the component Auth Guard. Such manipulation of the argument user_id leads to improper authentication. The attack can be executed remotely. The…
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High 7.3
OSSRS srs System API api.go systemAPI.Run missing authentication
A vulnerability was detected in OSSRS srs up to 7.0-a1. This affects the function systemAPI.Run of the file internal/proxy/api.go of the component System API. Performing a manipulation results in missing authentication. It is possible to initiate the attack r…
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High 7.5
CVE-2026-82988
There exists an arbitrary file download in vCast APK delivery mechanism in ViewSonic ViewBoard unknown allows a remote, unauthenticated attacker to trigger unprivileged APK installation via serving a malicious APK URL through an unauthenticated download endpo…
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Critical 9.1
Plane: Account Takeover via Unverified OAuth Email Match (Gitea, self-managed GitLab)
Plane is an open-source project management tool. Prior to 1.4.0, Plane trusts email addresses returned by Gitea OAuth and by self-managed GitLab OAuth deployments where email confirmation is disabled, without verifying that the provider authenticated ownershi…
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Critical 9.8
Plane: Pre-auth workspace invitation hijack via email-squat and self-served invitation token leak in Plane
Plane is an open-source project management tool. Prior to 1.4.0, Plane's signup flow creates a logged-in User row for any submitted email without an out-of-band ownership check, while User.email is unique=True. The authenticated user can call GET /api/users/m…
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Critical 9.0
A remote user validation failure vulnerability exists in HPE Integrated Lights-Out (iLO) 7 firmware.
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High 7.3
Casdoor API Endpoint authz_filter.go ApiFilter missing authentication
A vulnerability was detected in Casdoor up to 3.161.1. Affected is the function ApiFilter of the file routers/authz_filter.go of the component API Endpoint. Performing a manipulation results in missing authentication. The attack can be initiated remotely. The…
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High 7.3
kishor-23 food-waste-management-system Admin Signup signup.php missing authentication
A weakness has been identified in kishor-23 food-waste-management-system 411989e3ecb82895e53dca7865f72145f03d7d93/b3a70b2c492dc9904de5be1ad9389bd79b87f82c. Affected is an unknown function of the file admin/signup.php of the component Admin Signup. This manipu…
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High 7.5
ZITADEL before 3.4.14 and 4.16.2 Account Takeover via Passkey Enrollment
ZITADEL 3.x before 3.4.14 and 4.x before 4.16.2 contains an authentication bypass in the hosted Login V1 and Login V2 UIs that accepts passkey or other authenticator enrollment on identify-only login sessions, before any primary factor is verified. Unauthenti…
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High 8.2
ZITADEL before 4.17.1 Authentication Bypass via Login V2 for Deactivated Organizations
ZITADEL 4.x before 4.17.1 does not check an organization's inactive state during Login V2 authentication, verifying only the individual user's status. Users of a deactivated organization who hold valid credentials, an existing session, or a refresh token can …
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High 8.2
ZITADEL before 4.17.1 Unauthenticated MFA Enrollment via Login V1 Init Handlers
ZITADEL 3.x before 3.4.15 and 4.x before 4.17.1 contains a missing authentication flaw in the hosted Login V1 UI, whose second-factor enrollment and initialization handlers act on an identify-only session before any primary factor is verified. Attackers knowi…
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High 7.3
Ahsay AhsayCBS API ApiStructsAction.java checkSysPwd improper authentication
A vulnerability was detected in Ahsay AhsayCBS up to 9.15.2.69/10.3.4.44. This affects the function checkSysPwd of the file com/ahsay/obs/api/ApiStructsAction.java of the component API. Performing a manipulation of the argument random results in improper auth…
KEV Oct 14, 2026 -
Critical 9.2
MLS X.509 credential not bound to the LeafNode signature key
In Bouncy Castle for Java before 1.86, the Messaging Layer Security (MLS, RFC 9420) implementation did not bind an X.509 credential to a LeafNode's signature_key. LeafNode.verify() checked a leaf's signature against the signature_key carried in the leaf itsel…
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Medium 4.3
Burst Statistics <= 3.7.1 - Improper Authentication to Account Persistence via Share-Link Authentication Bypass via 'burst_share_token'
The Burst Statistics – Simple WordPress Analytics (Google Analytics Alternative) plugin for WordPress is vulnerable to Improper Authentication leading to Account Persistence in all versions up to, and including, 3.7.1. This is due to the `maybe_load_shared_da…
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High 8.2
TillKit < 1.0.5 - Unauthenticated POS Takeover via Hard-Coded Default Manager PIN
The TillKit WordPress plugin before 1.0.5 does not require the hard-coded, publicly known PIN of the privileged POS account it creates on activation to be changed before use, and it authenticates its public POS login endpoint on that PIN alone with no identit…
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High 7.5
WP 2FA < 4.1.0 - Two-Factor Authentication Bypass via TOTP Code Replay
The WP 2FA WordPress plugin before 4.1.0 does not invalidate a time-based one-time passcode once it has been used, allowing an attacker who knows an account's password and has observed a valid code within its validity window to replay it and bypass two-factor…
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Medium 5.3
onetwothreeneth HospitalManagementSystem sessions.php improper authentication
A security vulnerability has been detected in onetwothreeneth HospitalManagementSystem up to 9ef91ed6007314b6473110ed699dff76d158f61d. The impacted element is an unknown function of the file php/sessions.php. The manipulation of the argument ID leads to impro…
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Critical 9.8
JSON API Auth <= 3.1.2 - Unauthenticated Authentication Bypass via Cached 'generate_auth_cookie' Response
The JSON API Auth plugin for WordPress is vulnerable to Authentication Bypass via Cached Session Cookie Disclosure in all versions up to, and including, 3.1.2. The vulnerability exists because the required PI-Media/json-api parent plugin caches controller dis…
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Medium 5.3
Paytm Payment Gateway < 2.8.9 - Unauthenticated Order Status Manipulation via Payment Callback
The Paytm Payment Gateway WordPress plugin before 2.8.9 does not verify that payment callbacks genuinely originate from the payment provider when its secret key has not been configured, which is its state immediately after activation, allowing unauthenticated…
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Critical 9.8CVE-2026-19660 Public exploit
Divi Membership <= 2.3.0 - Unauthenticated Authentication Bypass via 'paypal_param' Parameter
The Divi Membership plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 2.3.0. The `process_paypal_callback` function, hooked to the `init` action, accepts a base64-encoded `paypal_param` GET parameter with no IPN…
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Critical 9.8CVE-2026-14378 Public exploit
DevKit Pro <= 2.3.0 - Unauthenticated Authentication Bypass to Administrator Account Takeover via 'original_user_id' Cookie in Frontend Revert Switch Flow
The DevKit Pro plugin for WordPress is vulnerable to Authentication Bypass Leading to Administrator Account Takeover in all versions up to, and including, 2.3.0 This is due to the `revert_switch` handler trusting the attacker-controlled `original_user_id` coo…
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High 8.7
Unauthenticated Remote Code Execution via MacTool Command Injection in TP-Link Tapo C120 & C200
Tapo C120 v1 and C200 V5 do not adequately protect login challenge data or sanitize attacker-controlled input processed by the MacTool handler. An unauthenticated attacker on the same local network can replay login challenge data to obtain an administrative s…
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Medium 5.1
Apache APISIX: Openid-connect introspection validation issue
Improper Authentication vulnerability in Apache APISIX. On a route using openid-connect plugin with remote introspection against an authorization server that serves multiple issuers, a token that introspects as active for one issuer may get accepted on a rout…
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Critical 9.1
Fleet before 4.87.0 Authentication Bypass via Device Identifiers
Fleet versions before 4.87.0 contain an authentication bypass vulnerability in the device API that accepts hostnames and hardware serials as authentication tokens in addition to device UUIDs. Unauthenticated attackers who know or guess these non-secret identi…
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Critical 9.8
Ultimate Multisite <= 2.15.0 - Unauthenticated Authentication Bypass via 'checkout_form' Parameter
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 …