CVE-2026-34974
phpMyFAQ: SVG Sanitizer Bypass via HTML Entity Encoding leads to Stored XSS and Privilege Escalation
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | thorsten |
| Product | phpmyfaq |
| Published | Apr 2, 2026 |
| Last Updated | Apr 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
thorsten / phpMyFAQ
< 4.1.1