What is CVE-2026-34974?

CVE-2026-34974 is a medium-severity vulnerability in Phpmyfaq, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-02.

How severe is CVE-2026-34974?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Phpmyfaq

CVE-2026-34974

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (7.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Phpmyfaq
Thorsten Phpmyfaq — versions < 4.1.1

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Product, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34974?: CVE-2026-34974 is a medium-severity vulnerability in Phpmyfaq, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-02.
How severe is CVE-2026-34974?: Medium severity. CVSS v3 base score is 5.4 out of 10.