CVE-2025-6590

Complete content leak of private wikis due to PasswordReset Wikitext injection in error message

State: Published
Severity: 4.6 Medium
Published: Feb 2, 2026
Updated: Feb 3, 2026
Reserved: Jun 24, 2025

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php.

This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.

Scores

CVSS	Score	Vector	Source
4.0	4.6 Medium	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N	wikimedia-foundation

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
MediaWikiWikimedia Foundation	1.39.12, 1.42.76 1.43.1, 1.44.0 and earlierAffected

References

https://phabricator.wikimedia.org/T392746

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