Microsoft Internet Explorer 6, 7, and 8 does not properly determine the origin of script code, which allows remote attackers to execute script in an unintended domain or security zone, and obtain sensitive information, via unspecified vectors, aka "Event Handler Cross-Domain Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11954
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2010/ms10-053