medium5.4
CVE-2025-53480
The CheckUser extension’s Special:Investigate page has a vulnerability in the Account information tab, where specific internationalized messages are rendered w…
Impact
The CheckUser extension’s Special:Investigate page has a vulnerability in the Account information tab, where specific internationalized messages are rendered without proper escaping. Attackers can exploit this by appending ?uselang=x-xss to the URL, causing reflected XSS when the UI renders affected message keys. This issue affects Mediawiki - CheckUser extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.
Affected products
| Product | Affected versions |
|---|---|
| Mediawiki - CheckUser Extension: From 1.39.X | before 1.39.13 |
| From 1.42.X | before 1.42.7 |
| From 1.43.X | before 1.43.2. |
Versions were read from the advisory text. No structured product data has been published for this record yet.