CVE-2026-12281 — Shibboleth < 2.5.4 - Unauthenticated Administrator Account Creation via Identity Header Spoofing
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 i…
Published: 2026-07-15 · CVSS: 8.1 · CVSS 3.1
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 the application, an unauthenticated attacker can log in with forged identity headers and, when automatic account creation and the default administrator role mapping are enabled, create and sign in as a new administrator. Exploitation requires the non-default HTTP header attribute mode, an empty or absent spoof key, automatic account creation enabled, and a deployment that does not strip untrusted client headers before they reach the application.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7