Cross-site scripting (XSS) vulnerability in Safari Reader in Apple iOS before 10 and Safari before 10 allows remote attackers to inject arbitrary web script or HTML via a crafted web site, aka "Universal XSS (UXSS)."
https://support.apple.com/HT207157
https://support.apple.com/HT207143
http://www.securitytracker.com/id/1036854
http://www.securityfocus.com/bid/93053
http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html
http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.html