Description
phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the regex-based SVG sanitizer in phpMyFAQ (SvgSanitizer.php) can be bypassed using HTML entity encoding in javascript: URLs within SVG <a href> attributes. Any user with edit_faq permission can upload a malicious SVG that executes arbitrary JavaScript when viewed, enabling privilege escalation from editor to full admin takeover. This issue has been patched in version 4.1.1.
Affected products
phpmyfaq: phpmyfaq
References3
- github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq… ExploitVendor Advisory
- github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq… ExploitVendor Advisory
- github.com/thorsten/phpMyFAQ/releases/tag/4.1.1 Product
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 8 · as of 12 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
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