Weakness (CWE)
CWE-303: Incorrect Implementation of Authentication Algorithm
The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.
Source: MITRE CWE-303
123 results · Feed
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Medium 5.4
Keycloak-services: keycloak-services: indefinite access token renewal via standard token exchange v2
A flaw was found in the token exchange mechanism of Keycloak. When using Standard Token Exchange V2, the system issues new tokens with a fresh lifetime based on the requester clients configuration instead of limiting it to the original tokens expiration. This…
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Unscored —
Apache OFBiz: Incorrect Authentication Algorithm Implementation in Password Reset Enables Full Account Takeover
Incorrect Implementation of Authentication Algorithm in the password-reset and login JWT validation in Apache OFBiz 24.09 before 24.09.08 on all platforms allows an attacker who has obtained a user's password-reset token (via email interception, log exposure,…
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Medium 6.8
SSH Multi-Factor Authentication Bypass in Progress WS_FTP Server
Multi-Factor Authentication Bypass vulnerability in SSH component in Progress Software WS_FTP Server versions prior to 2024.0.6, and 2025.0.3 on Windows allows authenticated users to bypass MFA requirements through improper association of authentication facto…
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Medium 5.4
Apache Answer: User Center integration does not revoke first-login sessions after central account suspension
Incorrect implementation of authentication algorithm vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. A flaw in the User Center login integration can cause a newly created external user session to omit its external identity, al…
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High 7.5
MOVEit Transfer Identity validation flaw in SFTP authentication
Incorrect implementation of authentication algorithm vulnerability in Progress MOVEit Transfer (SFTP module). This issue affects MOVEit Transfer: before 2025.1.6 and from 2026.0.0 before 2026.0.4.
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High 7.5
NGINX Ingress Controller vulnerability
Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP response from an OAuth IdP and allow an attacker to acquire unauthenticated access to protected path…
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Medium 6.5
Windows Shell Spoofing Vulnerability
Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
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High 7.4
Improper Kerberos server verification in Progress MarkLogic Server
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 do not sufficiently verify the identity of a Kerberos authentication service in certain password-based authentication configurations. A network-positioned attacker could imp…
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High 8.8
AsyncHttpClient: Digest mutual authentication is switched off by a peer offering qop=auth-int
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In 3.0.12, a peer offering only Digest qop=auth-int causes mutual-authentication verification to be skipped. AuthenticatorUti…
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Critical 9.1
Apache Impala: Impala Executor Webserver Auth Bypass
Incorrect implementation of JWT/OAuth authentication in Impala executors in Apache Impala versions up to and including 4.5.2 which allows attacked to access resources served by the executor's webserver when that webserver is configured to accept JWT/OAuth tok…
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High 7.3
Pgpool-II contains an incorrect implementation of an authentication algorithm, which may allow an unauthenticated attac…
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High 7.5
Bitwarden Server 2025.6.0 < 2025.6.0 Authentication Bypass via SSO Identifier Truncation
Bitwarden Server 2025.6.0 before 2026.5.0 declares the @ExternalId parameter of the User_ReadBySsoUserOrganizationIdExternalId stored procedure as NVARCHAR(50) while the column it queries stores NVARCHAR(300), silently truncating the SSO login identifier on S…
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Critical 10.0
[mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the HTTP transport accepts requests without a verified user identity and downstream fetcher construction falls back to the operator's globall…
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Low 3.7
libmongoc SCRAM client nonce-validation bypass
A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-m…
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Critical 9.2
Password Authentication Bypass Vulnerability in GX Works3 and Motion Control Setting
Incorrect Implementation of Authentication Algorithm Vulnerability in Mitsubishi Electric GX Works3 and Motion Control Setting allows a local attacker to successfully authenticate even with an invalid block password by executing the affected product and modif…
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Medium 4.7
On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the
On affected platforms running Arista EOS with VRRPv2 IP Authentication Header (IP-AH) authentication configured, an unauthenticated attacker with access to the layer 2 network segment on which VRRP is running could bypass VRRP authentication and claim the vir…
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High 8.2
On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various rou
On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various routin…
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Critical 9.2
CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidenti…
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Medium 5.6
Improper Authentication Verification in the Okta Hyperdrive Agent MFA Response Handling
The Okta Hyperdrive agent plugin returns a success response without a signed SAML assertion when the organization's policy requires no MFA for a given user. The response contains only a bare boolean validation indicator with no cryptographic artifact, resulti…
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High 8.5
A vulnerability exists in SYS600 RBAC mechanism where users having access to the engineering tools could elevate their …
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High 8.5
A vulnerability exists in SYS600 which allows any user authenticated to the operating system of the server hosting the …
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High 8.8
TOTP enrollment hijack: password gate skipped due to unawaited promise
Pingvin Share X is a secure and easy self-hosted file sharing platform. A vulnerability in versions 1.5.0 through 1.18.0 allow an attacker to bypass password verification when managing Time-based One-Time Password (TOTP) settings. The root cause is a missing …
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Medium 5.3
DEEBOT PRO M1 and DEEBOT PRO K1VAC incorrectly implement authentication algorithm in Websocket communications. An unaut…
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High 7.3
Grav CMS Scheduler Webhook Authentication Bypass via Null Short-Circuit
Grav CMS's scheduler-webhook plugin contains an authentication bypass in the webhook token check. When the webhook feature is enabled but no webhookToken is configured, a compound conditional short-circuits and skips token validation, so an unauthenticated re…
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High 8.7
Digest authentication lossy encoding
In Eclipse Jetty, the Digest authentication server-side component uses ISO-8859-1 to encode the password as bytes. This was done because the initial specification for HTTP did not specify explicitly a charset, and it was assumed to be ISO-8859-1 for historica…
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Critical 9.8
vCenter authentication-bypass vulnerability
VMware vCenter contains an authentication bypass vulnerability in the VMware Directory Service. A malicious actor with network access to vCenter may exploit this issue to bypass authentication and gain unauthorized access to the system.
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Medium 6.7
Ekushey Project Manager CRM 5.0 Missing Uniqueness Constraint via Client Email
Ekushey Project Manager CRM through version 5.0 contains a missing uniqueness constraint vulnerability that allows authenticated administrators to create duplicate client accounts with identical email and password credentials. Attackers can exploit the lack o…
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Medium 5.6
Authentication Bypass via Null Short-Circuit in Grav CMS Scheduler Webhook Token Check
Grav CMS scheduler-webhook plugin contains an authentication bypass vulnerability that allows unauthenticated remote attackers to trigger configured scheduled jobs by exploiting a short-circuit logic flaw in the webhook token validation. Attackers can send a …
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High 8.8
ASP.NET Core Elevation of Privilege Vulnerability
Incorrect implementation of authentication algorithm in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
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High 8.8
Windows SMB Server Elevation of Privilege Vulnerability
Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
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High 8.8
Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.
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High 7.3
BerriAI litellm MCP Proxy user_api_key_auth_mcp.py UserAPIKeyAuth improper authentication
A weakness has been identified in BerriAI litellm up to 1.59.8. Affected is the function UserAPIKeyAuth of the file litellm/proxy/_experimental/mcp_server/auth/user_api_key_auth_mcp.py of the component MCP Proxy. Executing a manipulation can lead to improper …
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Critical 9.1
Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator
The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading t…
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Critical 10.0
UDS Identity Config has a client authentication bypass in `ClientIdAndKubernetesSecretAuthenticator`
UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the `client-kubernetes-secret` Keycloak client authenticator …
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Critical 10.0CVE-2026-46595 Public exploit
Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh
Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.
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Medium 5.4
Org.keycloak/keycloak-services: keycloak: org.keycloak.protocol.oidc: security flaw in org.keycloak/keycloak-services
A flaw was found in Keycloak. When both realm-level and client-level `notBefore` revocation policies are configured, Keycloak's OpenID Connect (OIDC) Introspection feature fails to properly honor the realm-level policy. This allows tokens that should have bee…
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Critical 9.1
Microsoft SSO Plugin for Jira & Confluence Elevation of Privilege Vulnerability
Incorrect implementation of authentication algorithm in Microsoft SSO Plugin for Jira & Confluence allows an unauthorized attacker to elevate privileges over a network.
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High 8.1
Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.
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High 8.2
CoreDNS TSIG authentication bypass on gRPC, QUIC, DoH, and DoH3 transports
CoreDNS is a DNS server written in Go. In versions prior to 1.14.3, the gRPC, QUIC, DoH, and DoH3 transport implementations incorrectly handle TSIG authentication. For gRPC and QUIC, the server checks whether the TSIG key name exists in the configuration but …
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High 8.7
CoreDNS TSIG authentication bypass on encrypted DNS transports
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports (DoT, DoH, DoH3, DoQ, and gRPC) because it trusts the transport writer's TsigStatus() instead of performing verification itse…