Wikimedia Foundation MediaWiki up to 1.46.0/1.45.4/1.43.9 CentralAuth cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in Wikimedia Foundation MediaWiki up to 1.46.0/1.45.4/1.43.9. This issue affects some unknown processing of the component CentralAuth. The manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-103047. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Wikimedia Foundation MediaWiki up to 1.46.0/1.45.4/1.43.9. Affected is an unknown code block of the component CentralAuth. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. CVE summarizes:

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth extension allows Stored XSS. This issue affects Mediawiki - CentralAuth extension: before 1.46.1, 1.45.5, 1.43.10.

The advisory is available at phabricator.wikimedia.org. This vulnerability is traded as CVE-2026-103047 since 09/30/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 1.46.1, 1.45.5 or 1.43.10 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• Wikimedia Foundation

Name

• MediaWiki

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.43.0
• 1.43.1
• 1.43.2
• 1.43.3
• 1.43.4
• 1.43.5
• 1.43.6
• 1.43.7
• 1.43.8
• 1.43.9
• 1.44
• 1.45
• 1.45.0
• 1.45.1
• 1.45.2
• 1.45.3
• 1.45.4
• 1.46.0

License

• open-source

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CPE 2.2info

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