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Shibboleth vulnerabilities
Shibboleth has 1 known vulnerability in this database. The most recent published record is dated 15 Jul 2026.
- Known vulnerabilities
- 1
- Active installs
- 3,000+
- Latest version
- 2.5.4
- Last updated
- 22 Jun 2026
- Most recent
- 15 Jul 2026
Find it in your WordPress dashboard under Plugins. Severity is based on the CVSS score published with the CVE where one is available.
| Vulnerability | Severity | Affected | Fix | Published |
|---|---|---|---|---|
| Authentication bypass CVE-2026-12281 | High 8.1 | Before 2.5.4 | Fixed in 2.5.4 | 15 Jul 2026 |
Read the published descriptions
- CVE-2026-12281, 15 Jul 2026
- 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. CVE record
What to do if you run Shibboleth
If you run Shibboleth, open WordPress and check the installed version in Plugins. Compare it with the affected versions in the vulnerability record. If a fixed version is available, take a current backup and update to that version or the latest supported release.
If no fixed version exists, consider disabling and removing the plugin or replacing it with a maintained alternative. After dealing with the affected software, check administrator users, unexpected file changes, redirects, unfamiliar pages and security logs for signs that the site may already have been altered.
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