Improper Authentication
CWE-287
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
We track 1,836 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.7. 52 have been exploited in real attacks.
How this weakness is prevented
- Architecture and Design: Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Latest Improper Authentication vulnerabilities
- 7.5 High severity
vikunja: Improper Authentication
Vikunja is an open-source self-hosted task management platform. In versions 1.0.0 through 2.3.0, when an administrator enables the per-provider `emailfallback` option on an OpenID Connect provider, Vikunja links an SSO login to a pre-existing local (username+p
- 8.1 High severity
pingvin-share-x: Improper Authentication
Pingvin Share X from 0.19.0 before 1.22.0 contains an improper authentication vulnerability that allows remote unauthenticated attackers to take over accounts by abusing automatic OAuth email linking in OAuthService.signUp(). Attackers can register a victim's
- 8.1 High severity
nginx-ui: Improper Authentication
Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, POST /api/login checks EnabledOTP but does not require a WebAuthn assertion when EnabledPasskey is true and no TOTP secret is configured. A passkey-only account is therefore iss
- 7.1 High severity
phpnuxbill: Improper Authentication
PHPNuxBill through 2025.3.20 contains an authentication bypass vulnerability in RADIUS CHAP verification because Password::chap_verify() returns true when the supplied response does not match. Attackers who know a valid customer or PPPoE username can log in th
- 8.1 High severity
FalkorDB: Improper Authentication
An improper authentication vulnerability in the is_authenticated function (src/bolt/bolt_api.c) in FalkorDB before 4.20.0 allows a remote unauthenticated attacker to execute graph queries without credentials through the Bolt endpoint. The function decides whet
- 8.7 High severity
Tapo C325WB v2: Improper Authentication
TP-Link Tapo C325WB V2 contains an unauthenticated authorization bypass vulnerability in the HTTPS JSON API dispatcher on TCP port 443. An attacker on the adjacent network can append an onboarding-scoped object to a JSON request to bypass session verification
- 7.5 High severity
Security Verify Access: Improper Authentication
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 could allow a remote attacker to bypass authentication due to improper authentication.
- 7.5 High severity
Security Verify Access: Improper Authentication
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 could allow a remote attacker to bypass security restrictions due to improper authentication.
- 9.8 Critical severity
DataPower Gateway 10.6CD: Improper Authentication
IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2 could allow a remote attacker to obtain administrative access due to failure to reject empty passwords during LDAP authentication
- 9.8 Critical severity
Ultimate Multisite: Improper Authentication
The Ultimate Multisite WordPress plugin before 2.17.0 does not require authentication before a logged-out checkout is linked to, and logged in as, an existing WordPress account matching the submitted email address, and its duplicate-account check normalizes th
- 7.1 High severity
MISP: Improper Authentication
On MISP instances configured to require TOTP enrolment (Security.otp_required), the enforcement of the mandatory two-factor authentication setup applied only to standard browser requests. An authenticated user who had not yet enrolled in TOTP could bypass the
- 8.8 High severity
wolfSSH: Improper Authentication
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 be
- 9.1 Critical severity
Gitea: Improper Authentication
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 ne
- 8.1 High severity
backstage: Improper Authentication
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
- 8.1 High severity
backstage: Improper Authentication
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 Clou
- 8.1 High severity
Gitea: Improper Authentication
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 sess
- 9.8 Critical severity
ClearPass Policy Manager (CPPM): Improper Authentication
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 u
- 9.8 Critical severity
ClearPass Policy Manager (CPPM): Improper Authentication
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 gai
- 9.8 Critical severity
AOS-Switch (AOS-S): Improper Authentication
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. Success
- 9.8 Critical severity
Gitea: Improper Authentication
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 pas
- 7.6 High severity
UAA: Improper Authentication
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 presentin
- 7.3 High severity
Drug Recommendation System: 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
- 7.3 High severity
srs: Improper 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 re
- 7.5 High severity
vCast: Improper Authentication
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 endpoi
- 9.1 Critical severity
plane: Improper Authentication
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 ownership
- 9.8 Critical severity
plane: Exposure of Sensitive Information to an Unauthorized Actor
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/me
- 7.3 High severity
Casdoor: Improper 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
- 7.3 High severity
food-waste-management-system: Improper 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 manipul
- 8.2 High severity
zitadel: Improper Authentication
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 s
- 7.5 High severity
zitadel: Improper Authentication
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. Unauthentic
- 8.2 High severity
zitadel: Improper Authentication
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 knowin
- 7.3 High severity
Ahsay AhsayCBS Improper Authentication Exploited
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 authe
- 9.2 Critical severity
BC-JAVA: Improper Authentication
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 itself
- 8.2 High severity
TillKit: Improper Authentication
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 identity
- 7.5 High severity
WP 2FA: Improper Authentication
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
- 9.8 Critical severity
JSON API Auth: Improper Authentication
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 disp
- 9.8 Critical severity
Divi Membership: Improper Authentication
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
- 9.8 Critical severity
DevKit Pro: Improper Authentication
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` cook
- 8.7 High severity
Tapo C200 v5: Improper Authentication
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 se
- 9.1 Critical severity
fleet: Improper Authentication
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 identif