Mbq

**Name of the Vulnerable Software and Affected Versions** MediaWiki versions 1.36.x through 1.39.x before 1.39.5 MediaWiki versions 1.40.x before 1.40.1 **Description** An issue was discovered in includes/page/Article.php. Deleted revision existence is leaked due to incorrect permissions being checked, revealing a given revision ID belonged to the given page title and its timestamp, which are not supposed to be public information. **Recommendations** For MediaWiki versions 1.36.x through 1.39.x before 1.39.5, update to version 1.39.5 or later. For MediaWiki versions 1.40.x before 1.40.1, update to version 1.40.1 or later.