This is a notice that on Monday, April 15th between 20:00-21:00 UTC
(1-2pm PDT) Wikimedia Foundation will release security updates for
current and supported branches of the MediaWiki software. Downloads
and patches will be available at that time, with the git repositories
updated later that afternoon. CVSS scores are between 4.3 and 7.1,
most users will want to update.