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DRUPAL-CONTRIB-2026-135unknown

This module enables you to turn a Drupal install into the Central Authentication System (CAS) Server.

Impact

This module enables you to turn a Drupal install into the Central Authentication System (CAS) Server. It makes your database the primary location for other systems to use for authentication in a SSO environment.

Source excerpt · OSV
Applies when

This vulnerability is mitigated by the fact that an attacker must convince a user to click a specially crafted link.

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

drupal/cas_server Packagist:https://packages.drupal.org/8
Affected rangeRecorded fix
Earlier releases before 2.0.4Ecosystem versions2.0.4
From 2.1.0 before 2.1.3Ecosystem versions2.1.3

Version evidence: OSV · DRUPAL-CONTRIB-2026-135

View original version evidence (0 explicit versions)

Original source description

This module enables you to turn a Drupal install into the Central Authentication System (CAS) Server. It makes your database the primary location for other systems to use for authentication in a SSO environment.

The module doesn't sufficiently check the service URL used to redirect the user during logout, leading to an open redirect.

This vulnerability is mitigated by the fact that an attacker must convince a user to click a specially crafted link. The vulnerability cannot be exploited without user interaction and does not allow an attacker to directly compromise the CAS server or bypass authentication.

References