There's a new #MediaWiki security release out today. 11 security issues in total, plus plenty of bug fixes.
Updated #Debian packages will be available shortly for stretch, and buster. I've already updated sid/unstable and my Ubuntu PPA: https://launchpad.net/~legoktm/+archive/ubuntu/mediawiki-lts
This is the official end of upstream support for the 1.27.x LTS, but I'll be backporting patches for the entire lifetime of stretch. More details to come.
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