[20250901] - Core - Inadequate content filtering within the checkAttribute filter code

Project: Joomla! / Joomla! Framework
SubProject: CMS / filter
Impact: Moderate
Severity: Moderate
Probability: Moderate
Versions: 3.0.0-3.10.20-elts, 4.0.0-4.4.13, 5.0.0-5.3.3
Exploit type: XSS
Reported Date: 2025-08-03
Fixed Date: 2025-09-30
CVE Number: CVE-2025-54476

Description

Inadequate content filtering within the checkAttribute methods leads to XSS vulnerabilities in various components.

Affected Installs

Joomla! CMS versions 3.0.0-3.10.20-elts, 4.0.0-4.4.13, 5.0.0-5.3.3

Solution

Upgrade to version 4.4.14 or 5.3.4

Contact

The JSST at the Joomla! Security Centre.

Reported By: Flydragon, Poi, Cwy, Xtrimi