Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Phpmyfaq | Phpmyfaq | < 4.1.1 |
Related Weaknesses (CWE)
References
- https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1Product
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hggExploitVendor Advisory
- https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hggExploitVendor Advisory
FAQ
What is CVE-2026-34974?
CVE-2026-34974 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 with...
How severe is CVE-2026-34974?
CVE-2026-34974 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34974?
Check the references section above for vendor advisories and patch information. Affected products include: Phpmyfaq Phpmyfaq.