CVE-2021-42048 Information

Description

An issue was discovered in the Growth extension in MediaWiki through 1.36.2. Any admin can add arbitrary JavaScript code to the Newcomer home page footer which can be executed by viewers with zero edits.

Reference

https://gerrit.wikimedia.org/r/q/Iaa90a8976834d70caad592e9d1b18510318db537 https://phabricator.wikimedia.org/T289064