WebKit in Apple Safari before 5.1.7 does not properly track state information during the processing of form input, which allows remote attackers to fill in form fields on the pages of arbitrary web sites via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/75474
http://www.securitytracker.com/id?1027053
http://support.apple.com/kb/HT5282
http://secunia.com/advisories/47292
http://lists.apple.com/archives/security-announce/2012/May/msg00002.html