[20260503] - Core - XSS in com_contenthistory

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Moderate
Probability: Low
Versions: 3.0.0-5.4.5, 6.0.0-6.1.0
Exploit type: XSS
Reported Date: 2026-04-01
Fixed Date: 2026-05-26
CVE Number: CVE-2026-30894

Description

Lack of output escaping leads to a XSS vector in the content history component.

Affected Installs

Joomla! CMS versions 3.0.0-5.4.5, 6.0.0-6.1.0

Solution

Upgrade to version 5.4.6 or 6.1.1

Contact

The JSST at the Joomla! Security Centre.

Reported By: Phan Phan Hai Long