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Wikimedia Foundation MediaWiki Cross-Site Scripting Vulnerability

Vulnerability

A cross-site scripting (XSS) vulnerability has been identified in Wikimedia Foundation MediaWiki versions prior to 1.39.14, 1.43.4, and 1.44.1. This issue arises from improper input neutralization during web page generation, specifically in the program files includes/htmlform/CodexHTMLForm.php and includes/htmlform/fields/HTMLButtonField.php.

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.

Added: Feb 3, 2026, 12:24 AM
Updated: Feb 3, 2026, 12:24 AM

Vulnerability Rating

Custom Algorithm
spread
6.4
impact
1.7
exploitability
5.2
remediation
0.0
relevance
2.5
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.