CVE-2026-34974 | THREATINT

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.

PUBLISHED Reserved 2026-03-31 | Published 2026-04-02 | Updated 2026-04-02 | Assigner GitHub_M

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 4.1.1

affected

References

github.com/...pMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg exploit

github.com/...pMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg

github.com/thorsten/phpMyFAQ/releases/tag/4.1.1

cve.org (CVE-2026-34974)

nvd.nist.gov (CVE-2026-34974)

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