TwoColConflict Extension up to 1.39.12/1.42.6/1.43.1 on Mediawiki cross site scripting

Summaryinfo

A vulnerability labeled as problematic has been found in TwoColConflict Extension up to 1.39.12/1.42.6/1.43.1 on Mediawiki. Affected is an unknown function. Executing a manipulation can lead to cross site scripting. This vulnerability is tracked as CVE-2025-53494. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in TwoColConflict Extension up to 1.39.12/1.42.6/1.43.1 on Mediawiki. This vulnerability affects an unknown part. 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. CVE summarizes:

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - TwoColConflict Extension allows Stored XSS.This issue affects Mediawiki - TwoColConflict Extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

The weakness was disclosed by SomeRandomDeveloper. The advisory is shared for download at phabricator.wikimedia.org. This vulnerability was named CVE-2025-53494 since 06/30/2025. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 1.39.13, 1.42.7 or 1.43.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-19713). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• TwoColConflict Extension

Version

• 1.39.0
• 1.39.1
• 1.39.2
• 1.39.3
• 1.39.4
• 1.39.5
• 1.39.6
• 1.39.7
• 1.39.8
• 1.39.9
• 1.39.10
• 1.39.11
• 1.39.12
• 1.42.0
• 1.42.1
• 1.42.2
• 1.42.3
• 1.42.4
• 1.42.5
• 1.42.6
• 1.43.0
• 1.43.1

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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