CVE-2025-61648
Unknown Unknown - Not Provided
Cross-Site Scripting in Wikimedia CheckUser Allows Input Injection

Publication date: 2026-02-03

Last updated on: 2026-04-09

Assigner: wikimedia-foundation

Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files modules/ext.CheckUser.TempAccounts/components/ShowIPButton.Vue, modules/ext.CheckUser.TempAccounts/SpecialBlock.Js. This issue affects CheckUser: from * before 1.44.1.
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Meta Information
Published
2026-02-03
Last Modified
2026-04-09
Generated
2026-06-16
AI Q&A
2026-02-03
EPSS Evaluated
2026-06-15
NVD
CVE-2025-61648
EUVD
EUVD-2025-206640
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mediawiki checkuser to 1.44.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
KEV Icon
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.
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Executive Summary

This vulnerability is a Cross-site Scripting (XSS) issue in the Wikimedia Foundation's CheckUser extension. It occurs due to improper neutralization of input during web page generation, specifically in certain program files related to temporary accounts and IP display. This means that malicious input can be injected and executed in the context of a user's browser when viewing affected pages.

Impact Analysis

The vulnerability can allow attackers to execute malicious scripts in the browsers of users who view affected pages. This can lead to theft of user credentials, session hijacking, or other malicious actions performed on behalf of the user without their consent.

Compliance Impact

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Detection Guidance

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