CVE-2026-58037
Received Received - Intake

Cross-Site Scripting in MediaWiki

Publication date: 2026-07-01

Last updated on: 2026-07-01

Assigner: wikimedia-foundation

Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Language/Language.Php, includes/Logging/BlockLogFormatter.Php, includes/Logging/LogFormatter.Php, includes/Logging/PatrolLogFormatter.Php, includes/Logging/RenameuserLogFormatter.Php, includes/Logging/TagLogFormatter.Php, includes/Specials/SpecialVersion.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

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Meta Information

Published
2026-07-01
Last Modified
2026-07-01
Generated
2026-07-01
AI Q&A
2026-07-01
EPSS Evaluated
N/A
NVD
CVE-2026-58037
EUVD
EUVD-2026-41042

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
wikimedia mediawiki to 1.46.0 (exc)
wikimedia mediawiki 1.45.4
wikimedia mediawiki 1.44.6
wikimedia mediawiki 1.43.9

Helpful Resources

Exploitability

CWE
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KEV
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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

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Executive Summary

This vulnerability is an Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). It affects the Wikimedia Foundation's MediaWiki software in several program files related to language and logging functionalities. Essentially, the software does not properly sanitize user input before including it in web pages, which can allow attackers to inject malicious scripts.

Impact Analysis

The vulnerability can allow attackers to execute malicious scripts in the context of the affected MediaWiki web pages. This can lead to unauthorized actions such as stealing user session tokens, defacing web content, or redirecting users to malicious sites, potentially compromising user data and the integrity of the website.

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