Launchpad.net

CVE 2007-5338

Mozilla Firefox before 2.0.0.8 and SeaMonkey before 1.1.5 allow remote attackers to execute arbitrary Javascript with user privileges by using the Script object to modify XPCNativeWrappers in a way that causes the script to be executed when a chrome action is performed.

See the CVE page on Mitre.org for more details.