Martijn Wargers, Josh Soref, Jesse Ruderman, and Ehsan Akhgari discovered flaws in the browser engine of Firefox. If a user were tricked into viewing a malicious website, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. It was discovered that Firefox could be made to access previously freed memory. If a user were tricked into viewing a malicious website, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Paul Stone discovered that Firefox could be made to change a mouse click into a drag and drop event. If the user could be tricked into performing this action twice on a crafted website, an attacker could execute arbitrary JavaScript with chrome privileges. It was discovered that the XMLHttpRequestSpy module as used by the Firebug add-on could be used to escalate privileges within the browser. If the user had the Firebug add-on installed and were tricked into viewing a malicious website, an attacker could potentially run arbitrary JavaScript