Microsoft : Security Vulnerabilities, CVEs, Published In December 2011 (Information Leak)

Microsoft Internet Explorer 6 through 9 does not properly use the Content-Disposition HTTP header to control rendering of the HTTP response body, which allows remote attackers to read content from a different (1) domain or (2) zone via a crafted web site, aka "Content-Disposition Information Disclosure Vulnerability."

The XSS Filter in Microsoft Internet Explorer 8 allows remote attackers to read content from a different (1) domain or (2) zone via a "trial and error" attack, aka "XSS Filter Information Disclosure Vulnerability."

The Cascading Style Sheets (CSS) implementation in Microsoft Internet Explorer 8.0 and earlier does not properly handle the :visited pseudo-class, which allows remote attackers to obtain sensitive information about visited web pages via a crafted HTML document, a related issue to CVE-2010-2264.