As per the MediaWiki version lifecycle[1], I would like to announce the
formal end of life (EOL) of MediaWiki 1.37 as of today, Wednesday November
30, 2022.
This means that MediaWiki 1.37 will no longer receive maintenance or
security backports. It is therefore strongly discouraged that you continue
to use it.
It is recommended to upgrade either to MediaWiki 1.38, which will be
supported until June 2023 or to 1.39 (released today), the next LTS after
1.35, which will be supported until November 2025.
Thanks!
Sam Reed
[1]
https://www.mediawiki.org/wiki/Version_lifecycle