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Joomla! CMS Output Escaping Vulnerability Leading to Cross-Site Scripting

Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in Joomla! CMS versions 4.0.0 prior to 5.4.3 and 6.0.0 prior to 6.0.3. The issue arises from a lack of output escaping for article titles, which creates XSS vectors in various locations throughout the application.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Remediation

Users are advised to upgrade to Joomla! CMS version 5.4.4 or 6.0.4.

Added: Apr 1, 2026, 10:27 AM
Updated: Apr 1, 2026, 10:27 AM

Vulnerability Rating

Custom Algorithm
spread
7.6
impact
1.7
exploitability
5.2
remediation
7.7
relevance
5.1
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.