Hello -
One small correction regarding the recent MediaWiki Extensions and Skins Security Release Supplement announcement emails - within their email subject and the first paragraph of the announcement, it was stated that these releases were for MediaWiki versions 1.39.9, 1.41.3 and 1.42.2. This is incorrect. The correct versions for this release are 1.39.12, 1.42.6 and 1.43.1 per the now-public security release task [0]. We apologize for this error.
[0] https://phabricator.wikimedia.org/T382326