Vulnerability · Published May 15, 2026 · Assigned by VulnCheck

CVE-2026-46360phpMyFAQ - Stored XSS via Entity Decoding Depth Limit Bypass in SVG Sanitizer

Medium 5.4

In plain English

A medium-severity cross-site scripting in phpmyfaq from thorsten. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 91.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

phpMyFAQ before 4.1.2 contains a stored cross-site scripting vulnerability in SvgSanitizer::decodeAllEntities() that limits recursive entity decoding to 5 iterations, allowing attackers to bypass sanitization. Authenticated users with FAQ_EDIT permission can upload malicious SVG files with deeply nested ampersand encoding around numeric HTML entities to reconstruct javascript: URLs, which execute arbitrary JavaScript when clicked by other users viewing the uploaded SVG.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	phpmyfaq/phpmyfaq	4.1.2	GHSA-whqh-9pq5-c7r3
Packagist	thorsten/phpmyfaq	4.1.2	GHSA-whqh-9pq5-c7r3

Affected products (as reported)

Vendor	Product	Versions
thorsten	phpmyfaq	0 – before 4.1.2

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

GHSA Advisory GHSA-whqh-9pq5-c7r3 vendor-advisory
VulnCheck Advisory: phpMyFAQ - Stored XSS via Entity Decoding Depth Limit Bypass in SVG Sanitizer third-party-advisory