[20260901] - Core - XSS in HTMLHelper::link method

Project: Joomla!
SubProject: CMS
Impact: Moderate
Severity: Moderate
Probability: Low
Versions: 1.5.0-5.4.8,6.0.0-6.1.3
Exploit type: XSS
Reported Date: 2026-08-09
Fixed Date: 2026-09-25
CVE Number: CVE-2026-90906

Description

Lack of escaping leads to XSS vulnerabilities in the link method of the HTMLHelper.

Affected Installs

Joomla! CMS versions 1.5.0-5.4.8, 6.0.0-6.1.3

Solution

Upgrade to version 5.4.9, 6.1.4

Contact

The JSST at the Joomla! Security Centre.

Reported By: Demyanchuk V.