CVE-2026-96873
Received Received - Intake

Reflected Cross-Site Scripting in MediaWiki CirrusSearch Extension

Publication date: 2026-09-24

Last updated on: 2026-09-24

Assigner: wikimedia-foundation

Description
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.

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Meta Information

Published
2026-09-24
Last Modified
2026-09-24
Generated
2026-09-24
AI Q&A
2026-09-24
EPSS Evaluated
N/A
NVD
CVE-2026-96873
EUVD
EUVD-2026-86230

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mediawiki cirrussearch 1.46.0

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.

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Executive Summary

This is a reflected cross-site scripting (XSS) vulnerability in the MediaWiki CirrusSearch extension. It occurs when user input is not properly neutralized during web page generation, allowing attackers to inject malicious scripts that execute in the context of a victim's browser.

Detection Guidance

Detecting this reflected XSS vulnerability requires checking for vulnerable versions of the MediaWiki CirrusSearch extension. Inspect installed extensions and compare versions against 1.46.0. Use commands like grep or find in MediaWiki directories to locate CirrusSearch files and check version metadata.

Impact Analysis

An attacker could trick you into clicking a malicious link, which would execute arbitrary JavaScript in your browser. This could lead to theft of session cookies, account takeover, or unauthorized actions on your behalf if you are logged into a vulnerable MediaWiki site.

Mitigation Strategies

Immediately update the MediaWiki CirrusSearch extension to the latest version beyond 1.46.0. If updating is not possible, disable the CirrusSearch extension temporarily until a patch is applied. Monitor for unusual web requests or scripts that may exploit this XSS flaw.

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