Privilege escalation in Thorsten Phpmyfaq
CVE-2026-111909
phpMyFAQ before 4.1.9 contains a missing authorization vulnerability in the deleteUser() API that allows authenticated non-superadmin users with delete_user permission to delete superadmin accounts. Attackers can send a DELETE request to /admin/api/user/delete with a superadmin's userId other than 1, removing administrative access and accountability.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
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-7j43-ww55-pm3g (vendor-advisory)
- www.vulncheck.com/advisories/phpmyfaq-before-4.1.9-missing-authorization-allows… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111909?
- CVE-2026-111909 is a high-severity vulnerability in Thorsten Phpmyfaq, classified under Improper Privilege Management. CVSS score: 8.1/10. Published 2026-10-17.
- How severe is CVE-2026-111909?
- High severity. CVSS v3 base score is 8.1 out of 10.