Medium 5.4Published Apr 2, 2026

CVE-2026-34974phpMyFAQ: SVG Sanitizer Bypass via HTML Entity Encoding leads to Stored XSS and Privilege Escalation

Updated under an hour ago (Oct 27, 2026, 4:40 AM ET)

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It affects thorsten phpMyFAQ and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for thorsten phpMyFAQ

Exploited in the last 30 days

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: 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

thorsten phpMyFAQ thorsten:phpmyfaq (from the name)	before 4.1.1	CNA record
phpmyfaq phpmyfaq phpmyfaq:phpmyfaq	before 4.1.1	NVD

References

References

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg	x-refsource-confirm, exploit, vendor-advisory
https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1	x-refsource-misc, product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.