What is CVE-2026-12281?

CVE-2026-12281 is a high-severity vulnerability in Shibboleth, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-07-15.

How severe is CVE-2026-12281?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Shibboleth

CVE-2026-12281

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…

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Unknown Shibboleth — versions 0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-12281?: CVE-2026-12281 is a high-severity vulnerability in Shibboleth, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-07-15.
How severe is CVE-2026-12281?: High severity. CVSS v3 base score is 8.1 out of 10.