CVE-2025-53480
BaseFortify
Publication date: 2025-07-08
Last updated on: 2025-07-08
Assigner: wikimedia-foundation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the CheckUser extension's Special:Investigate page within the Account information tab. Certain internationalized messages are rendered without proper escaping, allowing attackers to exploit this by appending ?uselang=x-xss to the URL. This causes reflected Cross-Site Scripting (XSS) when the user interface renders the affected message keys.
How can this vulnerability impact me? :
The vulnerability can lead to reflected Cross-Site Scripting (XSS) attacks, which may allow attackers to execute malicious scripts in the context of the victim's browser. This can result in theft of user credentials, session hijacking, or other malicious actions performed on behalf of the user.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, you should upgrade the CheckUser extension of Mediawiki to a fixed version: at least 1.39.13 if using 1.39.X, at least 1.42.7 if using 1.42.X, or at least 1.43.2 if using 1.43.X. Avoid using the Special:Investigate page with the ?uselang=x-xss parameter until the update is applied.