CVE-2020-12051: Mediawiki

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

The CentralAuth extension through REL1_34 for MediaWiki allows remote attackers to obtain sensitive hidden account information via an api.php?action=query&meta=globaluserinfo&guiuser= request. In other words, the information can be retrieved via the action API even though access would be denied when simply visiting wiki/Special:CentralAuth in a web browser.

Affected products

• Mediawiki Mediawiki: affected versions not specified

Published 2020-04-21. Last modified 2026-06-17.