XSS in Thorsten Phpmyfaq
CVE-2026-111894
phpMyFAQ 3.2.1 before 4.1.9 and 4.2.0-alpha before 4.2.0-beta contains a stored cross-site scripting vulnerability that allows authenticated content authors to inject JavaScript by embedding iframes with data:text/html sources in FAQ or News content. Attackers can bypass the hostless media-host allowlist in FaqHelper::cleanUpContent(), which is rendered via Twig's raw filter, to run phishing interfaces or top-frame redirects for viewers.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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-fg92-v5rr-4xjq (vendor-advisory)
- www.vulncheck.com/advisories/phpmyfaq-3.2.1-before-4.1.9-and-4.2.0-alpha-before… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111894?
- CVE-2026-111894 is a medium-severity vulnerability in Thorsten Phpmyfaq, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-17.
- How severe is CVE-2026-111894?
- Medium severity. CVSS v3 base score is 5.4 out of 10.