Wikimedia Foundation MediaWiki ExternalGuidance Stored Cross-Site Scripting Vulnerability
Vulnerability
A stored cross-site scripting vulnerability has been identified in the Wikimedia Foundation MediaWiki ExternalGuidance extension, affecting versions from master prior to 1.39. This issue arises from improper neutralization of input during web page generation, allowing malicious users to inject and store scripts that could be executed in the context of the user.
Impact
Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user.
Added: Oct 20, 2025, 6:17 PM
Updated: Oct 20, 2025, 6:17 PM
Vulnerability Rating
Custom Algorithm
spread
0.0impact
1.7exploitability
7.0remediation
0.0relevance
0.7threat
3.2urgency
2.9incentive
1.7Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.