MediaWiki Improper Access Control Vulnerability - CVE-2015-8627
MediaWiki before 1.23.12 1.24.x before 1.24.5 1.25.x before 1.25.4 and 1.26.x before 1.26.1 do not properly normalize IP addresses containing zero-padded octets which might allow remote attackers to bypass intended access restrictions by using an IP address that was not supposed to have been allowed.