WebCore, as used in Apple Safari before 3.1, does not enforce the frame navigation policy for Java applets, which allows remote attackers to conduct cross-site scripting (XSS) attacks.
https://exchange.xforce.ibmcloud.com/vulnerabilities/41324
http://www.vupen.com/english/advisories/2008/0920/references
http://www.us-cert.gov/cas/techalerts/TA08-079A.html
http://www.securitytracker.com/id?1019653
http://www.securityfocus.com/bid/28335
http://www.securityfocus.com/bid/28290
http://secunia.com/advisories/29393
http://lists.apple.com/archives/security-announce/2008/Mar/msg00000.html