A vulnerability in Internet Explorer 6, which can be exploited by malicious people to conduct cross-domain scripting attacks.
The vulnerability is caused due to an input validation error when handling the "location" or "location.href" property of a window object. This can be exploited by a malicious website to e.g. open a trusted site and execute arbitrary script code in a user's browser session in context of the trusted site.
The vulnerability is confirmed in IE6 on Windows XP SP2. Other versions may also be affected.