Yesterday, MediaWiki 1.19.22 has been release which fixes some security issues.
This is a code-only change, and there's no database or configuration changes.
They did add a new permission flag to change another user's common.js, but as far as
I have been able to see, nobody in our instance used that.
This version is now running in stg (https://stg.fedoraproject.org/wiki/Special:Version
Could I get +1s to upgrade production?