Wikimedia Foundation MediaWiki up to 1.46.0 CirrusSearch Extension cross site scripting

Summaryinfo

A vulnerability marked as problematic has been reported in Wikimedia Foundation MediaWiki up to 1.46.0. Affected is an unknown function of the component CirrusSearch Extension. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2026-96873. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Wikimedia Foundation MediaWiki up to 1.46.0 and classified as problematic. Affected by this vulnerability is an unknown code of the component CirrusSearch Extension. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Mediawiki - CirrusSearch extension allows Reflected XSS. This issue affects Mediawiki - CirrusSearch extension through 1.46.0.

The advisory is shared at gerrit.wikimedia.org. This vulnerability is known as CVE-2026-96873 since 09/23/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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
• 1.44
• 1.45
• 1.46.0

License

• open-source

CPE 2.3info

• 🔒
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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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