Microsoft Internet Explorer 9 and 10, when script debugging is enabled, does not properly handle objects in memory during the processing of script, which allows remote attackers to execute arbitrary code via a crafted web site, aka "Internet Explorer Script Debug Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16687
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-047