CVE-2026-41671 Admidio: OIDC Token Introspection Endpoint Returns Active for All Tokens Without Validation

Admidio is an open-source user management solution. Prior to version 5.0.9, the OIDC token introspection endpoint /modules/sso/index.php/oidc/introspect always returns "active": true for every request, regardless of whether a valid token is provided, whether the token is expired, revoked, or...

CVE-2026-41671

Admidio prior to version 5.0.9 contains a vulnerability in its OIDC token introspection (/modules/sso/index.php/oidc/introspect) and revocation (/oidc/revoke) endpoints. The introspection endpoint always returns {"active": true} and the revocation endpoint returns {"revoked": true} without authen...

CVE-2026-41670 Admidio: SAML Response Sent to Unvalidated Assertion Consumer Service URL from AuthnRequest

Admidio is an open-source user management solution. Prior to version 5.0.9, the SAML IdP implementation in Admidio's SSO module uses the AssertionConsumerServiceURL value directly from incoming SAML AuthnRequest messages as the destination for the SAML response, without validating it against the...

CVE-2026-41670

Admidio is an open-source user management solution. Prior to version 5.0.9, the SAML IdP implementation in Admidio's SSO module uses the AssertionConsumerServiceURL value directly from incoming SAML AuthnRequest messages as the destination for the SAML response, without validating it against the...

CVE-2026-41670

Admidio before 5.0.9 permits an attacker who knows a registered SP’s Entity ID to craft a SAML AuthnRequest with an attacker-controlled AssertionConsumerServiceURL, causing the IdP to send a signed SAML response containing user attributes to the attacker’s URL. The root cause is that ACS URL is t...

CVE-2026-41670 Admidio: SAML Response Sent to Unvalidated Assertion Consumer Service URL from AuthnRequest

Admidio is an open-source user management solution. Prior to version 5.0.9, the SAML IdP implementation in Admidio's SSO module uses the AssertionConsumerServiceURL value directly from incoming SAML AuthnRequest messages as the destination for the SAML response, without validating it against the...

CVE-2026-41670 Admidio: SAML Response Sent to Unvalidated Assertion Consumer Service URL from AuthnRequest

Admidio is an open-source user management solution. Prior to version 5.0.9, the SAML IdP implementation in Admidio's SSO module uses the AssertionConsumerServiceURL value directly from incoming SAML AuthnRequest messages as the destination for the SAML response, without validating it against the...

CVE-2026-41669

Admidio prior to version 5.0.9 suffers a SAML signature validation bypass: validateSignature() can return an error message or false, but its return value is discarded by both handleSSORequest() and handleSLORequest(), so unsigned or invalidly signed AuthnRequests/LogoutRequests are processed like...

EUVD-2026-28279

Admidio is an open-source user management solution. Prior to version 5.0.9, the Admidio SAML Identity Provider implementation discards the return value of its validateSignature method at both call sites handleSSORequest line 418 and handleSLORequest line 613. The method returns error strings on...

CVE-2026-41669 Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed

Admidio is an open-source user management solution. Prior to version 5.0.9, the Admidio SAML Identity Provider implementation discards the return value of its validateSignature method at both call sites handleSSORequest line 418 and handleSLORequest line 613. The method returns error strings on...

CVE-2026-41669

Admidio is an open-source user management solution. Prior to version 5.0.9, the Admidio SAML Identity Provider implementation discards the return value of its validateSignature method at both call sites handleSSORequest line 418 and handleSLORequest line 613. The method returns error strings on...

CVE-2026-41669 Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed

Admidio is an open-source user management solution. Prior to version 5.0.9, the Admidio SAML Identity Provider implementation discards the return value of its validateSignature method at both call sites handleSSORequest line 418 and handleSLORequest line 613. The method returns error strings on...

CVE-2026-41669 Admidio: SAML Signature Validation Result Ignored — Forged AuthnRequests and LogoutRequests Processed

Admidio is an open-source user management solution. Prior to version 5.0.9, the Admidio SAML Identity Provider implementation discards the return value of its validateSignature method at both call sites handleSSORequest line 418 and handleSLORequest line 613. The method returns error strings on...

EUVD-2026-28278

Admidio is an open-source user management solution. Prior to version 5.0.9, several administrative operations in Admidio's preferences module database backup, test email, htaccess generation fire via GET requests with no CSRF token validation. Because SameSite=Lax cookies travel with top-level GE...

CVE-2026-41663 Admidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Email Send

Admidio is an open-source user management solution. Prior to version 5.0.9, several administrative operations in Admidio's preferences module database backup, test email, htaccess generation fire via GET requests with no CSRF token validation. Because SameSite=Lax cookies travel with top-level GE...

CVE-2026-41663

Admidio has a CSRF flaw (CVE-2026-41663) affecting versions prior to 5.0.9. The vulnerability lies in the preferences module where backup, test_email, and htaccess operations are executed via GET requests without CSRF validation, allowing exploitation via SameSite=Lax cookies to trigger actions o...

CVE-2026-41663

Admidio is an open-source user management solution. Prior to version 5.0.9, several administrative operations in Admidio's preferences module database backup, test email, htaccess generation fire via GET requests with no CSRF token validation. Because SameSite=Lax cookies travel with top-level GE...

CVE-2026-41663 Admidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Email Send

Admidio is an open-source user management solution. Prior to version 5.0.9, several administrative operations in Admidio's preferences module database backup, test email, htaccess generation fire via GET requests with no CSRF token validation. Because SameSite=Lax cookies travel with top-level GE...

CVE-2026-41663 Admidio: CSRF on Admin Preferences Triggers Unauthorized Backup, .htaccess Write, and Email Send

Admidio is an open-source user management solution. Prior to version 5.0.9, several administrative operations in Admidio's preferences module database backup, test email, htaccess generation fire via GET requests with no CSRF token validation. Because SameSite=Lax cookies travel with top-level GE...

CVE-2026-41662 Admidio: Missing Minimum Administrator Check in Role Membership Removal

Admidio is an open-source user management solution. Prior to version 5.0.9, Role::stopMembership does not verify whether removing a user from the administrator role leaves zero administrators. The deprecated Membership::stopMembership contains this safety check, but the current code path bypasses...