XSS in Thorsten Phpmyfaq
CVE-2026-46360
phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in SvgSanitizer::decodeAllEntities() that limits recursive entity decoding to 5 iterations, allowing attackers to bypass sanitization. Authenticated users with FAQ_EDIT permission can upload malicious SVG files with deeply nested ampersand encoding around numeric HTML entities to reconstruct javascript: URLs, which execute arbitrary JavaScript when clicked by other users viewing the uploaded SVG.
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
EPSS: 0.003 (15.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Thorsten Phpmyfaq — versions 0, 4.1.2
Weakness classification (CWE)
References
- github.com/thorsten/phpMyFAQ/security/advisories/GHSA-whqh-9pq5-c7r3 (vendor-advisory)
- www.vulncheck.com/advisories/phpmyfaq-stored-xss-via-entity-decoding-depth-limi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-46360?
- CVE-2026-46360 is a medium-severity vulnerability in Thorsten Phpmyfaq, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-15.
- How severe is CVE-2026-46360?
- Medium severity. CVSS v3 base score is 5.4 out of 10.