Updated mediawiki packages fix security vulnerabilities:
'$wgRateLimits' entry for 'user' overrides 'newbie' (CVE-2018-0503).
When a log event is (partially) hidden Special:Redirect/logid can link to the incorrect log and reveal hidden information (CVE-2018-0504).
BotPasswords can bypass CentralAuth's account lock (CVE-2018-0505).