CVE-2026-58037: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Wikimedia Foundation MediaWiki
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.
AI Analysis
Technical Summary
This vulnerability in MediaWiki involves improper neutralization of input during web page generation, classified as CWE-79 (Cross-site Scripting). It affects multiple source files including includes/Language/Language.Php and various logging formatter files. Versions affected are all prior to 1.46.0, specifically 1.45.4, 1.44.6, and 1.43.9. The vulnerability enables injection of malicious scripts into web pages, potentially compromising user interactions with the affected MediaWiki instances.
Potential Impact
The vulnerability allows attackers to execute arbitrary scripts in the context of the affected MediaWiki web pages. This can lead to theft of user credentials, session hijacking, or other malicious actions performed via the victim's browser. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented in the provided data. Users should monitor Wikimedia Foundation advisories for updates and apply patches once available.
CVE-2026-58037: CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') in Wikimedia Foundation MediaWiki
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.
CVSS v4.0
Score 0.0none
Affected software
pkg:composer/mediawiki/mediawikiRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in MediaWiki involves improper neutralization of input during web page generation, classified as CWE-79 (Cross-site Scripting). It affects multiple source files including includes/Language/Language.Php and various logging formatter files. Versions affected are all prior to 1.46.0, specifically 1.45.4, 1.44.6, and 1.43.9. The vulnerability enables injection of malicious scripts into web pages, potentially compromising user interactions with the affected MediaWiki instances.
Potential Impact
The vulnerability allows attackers to execute arbitrary scripts in the context of the affected MediaWiki web pages. This can lead to theft of user credentials, session hijacking, or other malicious actions performed via the victim's browser. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been documented in the provided data. Users should monitor Wikimedia Foundation advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- wikimedia-foundation
- Date Reserved
- 2026-06-27T13:32:41.613Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a45341927e9c79719b99930
Added to database: 07/01/2026, 15:36:57 UTC
Last enriched: 07/01/2026, 15:52:41 UTC
Last updated: 07/01/2026, 21:28:50 UTC
Views: 8
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