CVE-2025-6591: HTML injection in API action=feedcontributions output from i18n message

Published Feb 2, 2026
·
Updated

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/api/ApiFeedContributions.Php.

This issue affects MediaWiki: from before 1.39.13, 1.42.7 1.43.2, 1.44.0.

Affected Software

1 affected component
Wikimedia Foundation MediaWiki<1.39.13, >=1.42.7<=1.42.7, >=1.43.2<=1.43.2, >=1.44.0<=1.44.0

Event History

Feb 2, 2026
CVE Published
via MITRE·11:02 PM
Data Sourced
via MITRE·11:02 PM
Description
Data Sourced
via NVD·11:16 PM
DescriptionSeverityWeakness

Frequently Asked Questions

1

What is the severity of CVE-2025-6591?

CVE-2025-6591 has a severity rating that may impact the integrity of the MediaWiki web application.

2

How do I fix CVE-2025-6591?

To fix CVE-2025-6591, upgrade MediaWiki to versions 1.39.13 or later, or 1.42.7 or later, or versions 1.43.3 and higher.

3

What versions of MediaWiki are affected by CVE-2025-6591?

CVE-2025-6591 affects MediaWiki versions prior to 1.39.13, 1.42.7, 1.43.2, and 1.44.0.

4

What type of attack does CVE-2025-6591 facilitate?

CVE-2025-6591 facilitates HTML injection attacks through the API action=feedcontributions output.

5

Who is responsible for addressing CVE-2025-6591 vulnerability?

The Wikimedia Foundation is responsible for addressing the CVE-2025-6591 vulnerability in MediaWiki.

Contact

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