Cross-site scripting (XSS) vulnerability in WebKit in Apple Safari before 6.0 allows remote attackers to inject arbitrary web script or HTML by leveraging improper URL canonicalization during the handling of the location.href property.
http://www.securityfocus.com/bid/54695
http://support.apple.com/kb/HT5503
http://support.apple.com/kb/HT5400
http://lists.apple.com/archives/security-announce/2012/Sep/msg00003.html
http://lists.apple.com/archives/security-announce/2012/Jul/msg00000.html