[20260102] - Core - XSS vectors in the pagebreak and pagenavigation plugins

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Moderate
Probability: Low
Versions: 3.9.0-5.4.1, 6.0.0-6.0.1
Exploit type: XSS
Reported Date: 2025-09-29
Fixed Date: 2026-01-06
CVE Number: CVE-2025-63083

Description

Lack of output escaping leads to a XSS vector in the pagebreak and pagenavigation plugins.

Affected Installs

Joomla! CMS versions 3.9.0-5.4.1, 6.0.0-6.0.1

Solution

Upgrade to version 5.4.2 or 6.0.2

Contact

The JSST at the Joomla! Security Centre.

Reported By: peterhulst