CVE-2026-12281: high-severity vulnerability in Shibboleth
Shibboleth < 2.5.4 - Unauthenticated Administrator Account Creation via Identity Header Spoofing
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.1epss 0.4%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Unknown · Shibbolethpublic PoCs found — 1
cve_referencewpscan.com/vulnerability/8474eda4-6385-447a-9139-f57c049d1713/unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.