WebKit in Safari in Apple Mac OS X 10.4.11 and 10.5.1, iPhone 1.0 through 1.1.2, and iPod touch 1.1 through 1.1.2 allows remote attackers to "navigate the subframes of any other page," which can be leveraged to conduct cross-site scripting (XSS) attacks and obtain sensitive information.
https://exchange.xforce.ibmcloud.com/vulnerabilities/39091
http://www.vupen.com/english/advisories/2008/0147
http://www.vupen.com/english/advisories/2007/4238
http://www.us-cert.gov/cas/techalerts/TA07-352A.html
http://www.securityfocus.com/bid/26911
http://securitytracker.com/id?1019108
http://secunia.com/advisories/28497
http://secunia.com/advisories/28136
http://lists.apple.com/archives/security-announce/2008/Jan/msg00000.html
http://lists.apple.com/archives/security-announce/2007/Dec/msg00002.html
http://docs.info.apple.com/article.html?artnum=307302