Microsoft Internet Explorer 6 through 8 allows remote attackers to read content from a different (1) domain or (2) zone via crafted characters in Cascading Style Sheets (CSS) token sequences, aka "Internet Explorer Information Disclosure Vulnerability."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18342
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-088