Auth bypass in Thorsten Phpmyfaq
CVE-2026-111895
phpMyFAQ 3.2.0 before 4.0.0 and 4.0.2 before 4.2.0-beta contains an authentication bypass in its Microsoft Entra ID login flow, which links users by the mutable preferred_username claim and whose AuthEntraId::create() ignores the duplicate-login exception while continuing with the existing local account. Attackers controlling an Entra identity in the configured tenant with a matching preferred_username can take over that local account, including super-admin accounts.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/thorsten/phpMyFAQ/security/advisories/GHSA-6hhv-gc4g-f4r7 (vendor-advisory)
- www.vulncheck.com/advisories/phpmyfaq-3.2.0-before-4.0.0-and-4.0.2-before-4.2.0… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111895?
- CVE-2026-111895 is a medium-severity vulnerability in Thorsten Phpmyfaq, classified under Improper Authentication. CVSS score: 6.8/10. Published 2026-10-17.
- How severe is CVE-2026-111895?
- Medium severity. CVSS v3 base score is 6.8 out of 10.