Privilege escalation in Thorsten Phpmyfaq
CVE-2026-111891
phpMyFAQ from 4.2.0-alpha.2 before 4.2.0-beta contains a privilege escalation vulnerability in the group permission API, whose updatePermissions and updateMembers endpoints check held rights without regard to language or category scope and write unrestricted group grants. Non-superadmin administrators holding GROUP_EDIT can grant a group a right they hold only in a narrow scope and self-join it via updateMembers, gaining unrestricted FAQ create, edit, and publish access across all languages and categories.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/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-6vf7-mrj2-7c37 (vendor-advisory)
- www.vulncheck.com/advisories/phpmyfaq-from-4.2.0-alpha.2-before-4.2.0-beta-priv… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111891?
- CVE-2026-111891 is a medium-severity vulnerability in Thorsten Phpmyfaq, classified under Improper Privilege Management. CVSS score: 5.5/10. Published 2026-10-17.
- How severe is CVE-2026-111891?
- Medium severity. CVSS v3 base score is 5.5 out of 10.