The user interface in WebKit, as used in Apple Safari before 6.2.4, 7.x before 7.1.4, and 8.x before 8.0.4, does not display URLs consistently, which makes it easier for remote attackers to conduct phishing attacks via a crafted URL.
https://support.apple.com/HT204661
https://support.apple.com/HT204560
http://www.securitytracker.com/id/1031936
http://lists.apple.com/archives/security-announce/2015/Mar/msg00004.html
http://lists.apple.com/archives/security-announce/2015/Apr/msg00002.html