Unescaped message used in HTML on Special:Contributions

PKSA-k79b-82mf-pj31 CVE-2020-25812

Affected package: mediawiki/core

Affected version: >=1.34.0,<1.34.3|>=1.34.99,<1.35.0

Reported by:
FriendsOfPHP/security-advisories