Cross-site scripting (XSS) vulnerability in the WebKit JavaScript bindings in Apple iOS before 9.3.3 and Safari before 9.1.2 allows remote attackers to inject arbitrary web script or HTML via a crafted HTTP/0.9 response, related to a "cross-protocol cross-site scripting (XPXSS)" vulnerability.
https://support.apple.com/HT206902
https://support.apple.com/HT206900
http://www.securitytracker.com/id/1036343
http://www.securityfocus.com/bid/91835
http://www.securityfocus.com/archive/1/539295/100/0/threaded
http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html