Microsoft Internet Explorer 9 through 11 improperly implements a cross-site scripting (XSS) protection mechanism, which allows remote attackers to bypass the Same Origin Policy via a crafted web site, aka "Internet Explorer XSS Filter Bypass Vulnerability."
Improper Input Validation The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly.