The HTML form implementation in WebKit in Apple iOS before 9 does not prevent QuickType access to the final character of a password, which might make it easier for remote attackers to discover a password by leveraging a later prediction containing that character.
https://support.apple.com/HT205212
http://www.securitytracker.com/id/1033609
http://www.securityfocus.com/bid/76766
http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html