CVE-2021-31545
An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. The page_recent_contributors leaked the existence of certain deleted MediaWiki usernames, related to rev_deleted.
Date published : 2021-04-21
https://gerrit.wikimedia.org/r/q/I8d5ed9ca84282ee50832035af86123633fc88293