Cross-site scripting (XSS) vulnerability in WebKit in Apple iOS before 6.1 allows user-assisted remote attackers to inject arbitrary web script or HTML via crafted content that is not properly handled during a copy-and-paste operation.
http://support.apple.com/kb/HT5642
http://lists.apple.com/archives/security-announce/2013/Mar/msg00003.html
http://lists.apple.com/archives/security-announce/2013/Jan/msg00000.html