CVE-2021-30153: Mediawiki

Medium severity, CVSS 4.3. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue was discovered in the VisualEditor extension in MediaWiki before 1.31.13, and 1.32.x through 1.35.x before 1.35.2. . When using VisualEditor to edit a MediaWiki user page belonging to an existing, but hidden, user, VisualEditor will disclose that the user exists. (It shouldn't because they are hidden.) This is related to ApiVisualEditor.

Affected products

• Mediawiki Mediawiki: before 1.31.13 (fixed in 1.31.13); from 1.32.0, before 1.35.2 (fixed in 1.35.2)

Published 2023-04-15. Last modified 2026-06-17.