Internet Explorer 5.5 and 6.0 allows remote attackers to bypass restrictions for executing scripts via an object that processes asynchronous events after the initial security checks have been made.
www.securityfocus.com/bid/4082
docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-005
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A23
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A32