Mediawiki 1.31 before 1.31.1, 1.30.1, 1.29.3 and 1.27.5 contains an information disclosure flaw in the Special:Redirect/logid
https://www.debian.org/security/2018/dsa-4301
https://phabricator.wikimedia.org/T187638
https://lists.wikimedia.org/pipermail/wikitech-l/2018-September/090849.html
https://access.redhat.com/errata/RHSA-2019:3813