CVE-2026-12281

The Shibboleth WordPress plugin before version 2.5.4 is vulnerable to unauthenticated account creation due to a failure to fail closed when the HTTP header identity mode is active without an anti-spoofing key. The plugin treats any request containing identity headers as an authenticated session w...

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...