CVE-2015-5513: Cross-site scripting (XSS) vulnerability in the Shibboleth authentication module 6.x-4.x before 6.x-4.2 and...

Security readout for executives and security teams

This is a cross-site scripting issue in Drupal's Shibboleth authentication module. A logged-in user with the "Administer blocks" permission could inject script or HTML through login-link-related behavior. The business risk depends on whether the module is installed and how widely that powerful permission is delegated. Exposure is limited to Drupal sites using the affected Shibboleth authentication module branches, especially where non-core administrators have "Administer blocks" permission. Sites not using this contributed module are not indicated as affected by the provided sources. Handle as a moderate-priority remediation if affected Drupal sites exist. Urgency rises where many users have block administration rights or where administrator accounts may be weakly governed. There is no source-backed evidence of active exploitation in the provided bundle. Mitigation focus: Upgrade Shibboleth authentication module to 6.x-4.2, 7.x-4.2, or a later supported release.; Review and restrict accounts with the "Administer blocks" permission.; Check Drupal advisory pages for branch-specific vendor guidance..

Prepared

Jun 13, 2026, 22:03 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.