CVE-2026-34974

Summary

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 Software

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg

References

• https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg
• https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1

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