CVE-2023-37300 Information

Description

An issue was discovered in the CheckUserLog API in the CheckUser extension for MediaWiki through 1.39.3. There is incorrect access control for visibility of hidden users.

Reference

https://gerrit.wikimedia.org/r/q/I993fdcae1fedb7dd543b35a477026bc727615b0a https://phabricator.wikimedia.org/T330968