CVE-2025-6590: Wikimedia Foundation Mediawiki

Medium severity, CVSS 4.6. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Wikimedia Foundation Mediawiki

Published 2026-02-02. Last modified 2026-06-17.