XSS Auditor in WebKit in Apple Safari before 6.0.5 does not properly rewrite URLs, which allows remote attackers to trigger unintended form submissions via unspecified vectors.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-1053
http://support.apple.com/kb/HT5785
http://lists.apple.com/archives/security-announce/2013/Jun/msg00001.html