CVE-2026-111903

medium

Description

phpMyFAQ 4.2.0-alpha before 4.2.0-beta contains a stored cross-site scripting vulnerability in SvgSanitizer that allows users with FAQ_EDIT permission to bypass sanitization using XML DTD custom entities. Attackers can upload an SVG defining an entity that expands to javascript in an anchor href, executing script when viewers click it to hijack admin sessions.

References

https://www.vulncheck.com/advisories/phpmyfaq-4.2.0-alpha-before-4.2.0-beta-stored-xss-via-svg-dtd-entity-bypass

https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-j3v5-p957-w6gq

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-103317

Details

Source: Mitre, NVD

Published: 2026-10-17

Updated: 2026-10-17

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.4

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

Severity: Medium

CVSS v4

Base Score: 5.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Severity: Medium