The 1.31.12 version fixes the issue with the backports in the 1.31.11 release.
The patches linked here need applying on top of the previous patches for 1.31.11. See the previous email for those patches. The full downloads here contain all the previous fixes from the security and maintenance release.
Once again, I apologise for the inconvenience of the issues with the previous release.
********************************************************************** Download: https://releases.wikimedia.org/mediawiki/1.31/mediawiki-1.31.12.tar.gz
Download without bundled extensions: https://releases.wikimedia.org/mediawiki/1.31/mediawiki-core-1.31.12.tar.gz
Patch to previous version (1.31.11): https://releases.wikimedia.org/mediawiki/1.31/mediawiki-1.31.12.patch.gz
GPG signatures: https://releases.wikimedia.org/mediawiki/1.31/mediawiki-core-1.31.12.tar.gz.... https://releases.wikimedia.org/mediawiki/1.31/mediawiki-1.31.12.tar.gz.sig https://releases.wikimedia.org/mediawiki/1.31/mediawiki-1.31.12.patch.gz.sig
Public keys: https://www.mediawiki.org/keys/keys.html