CVE-2023-45371: Mediawiki

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue was discovered in the Wikibase extension for MediaWiki before 1.35.12, 1.36.x through 1.39.x before 1.39.5, and 1.40.x before 1.40.1. There is no rate limit for merging items.

Affected products

• Mediawiki Mediawiki: before 1.35.12 (fixed in 1.35.12); from 1.36.0, before 1.39.5 (fixed in 1.39.5); version 1.40.0 only

Published 2023-10-09. Last modified 2026-06-17.