CVE-2022-39193: Mediawiki

Medium severity, CVSS 5.3. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in the CheckUser extension for MediaWiki through 1.39.x. Various components of this extension can expose information on the performer of edits and logged actions. This information should not allow public viewing: it is supposed to be viewable only by users with suppression rights.

Affected products

• Mediawiki Mediawiki: version 1.39.0 only; version 1.39.1 only

Published 2023-01-20. Last modified 2026-06-17.