Sensitive Information Exposure in MediaWiki by Wikimedia Foundation
CVE-2025-6590

4.6MEDIUM

Key Information:

Vendor

Wikimedia Foundation

Status
Mediawiki
Vendor
CVE Published:
2 February 2026

What is CVE-2025-6590?

A vulnerability in Wikimedia Foundation's MediaWiki allows unauthorized actors to access sensitive information through a flaw in the program files, specifically in includes/htmlform/fields/HTMLUserTextField.php. This issue potentially exposes user data and could lead to privacy violations. Users are encouraged to review their MediaWiki installations to ensure they are not using affected versions ranging from unspecified versions to 1.44.0.

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Affected Version(s)

MediaWiki * <= 1.39.12, 1.42.76 1.43.1, 1.44.0

References

https://phabricator.wikimedia.org/T392746

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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