An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. Special:CheckUserLog allows CheckUser XSS because of date mishandling, as demonstrated by an XSS payload in MediaWiki:October.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-46150.json"