EUVD-2026-44594

The Shibboleth WordPress plugin before 2.5.4 does not fail closed when its HTTP header identity mode is enabled without an anti-spoofing key, treating any request that carries identity headers as an authenticated session without verifying them. On a deployment where untrusted client headers reach...

CVE-2026-12281

The vulnerability CVE-2026-12281 affects the Shibboleth WordPress plugin before 2.5.4. When HTTP header identity mode is enabled without an anti-spoofing key, the plugin does not fail closed and treats any request carrying identity headers as authenticated without verification. This allows an una...