A "less critical" vulnerability has been discovered in Internet Explorer 7, which can be exploited by malicious people to disclose potentially sensitive information.

The vulnerability is caused due to an error in the handling of redirections for URLs with the "mhtml:" URI handler. This can be exploited to access documents served from another web site.

Secunia has constructed a test, which is available at:
http://secunia.com/Internet_Explorer_Arbitrary_Content_Disclosure_Vulnerability_Test/

Secunia has confirmed the vulnerability on a fully patched system with Internet Explorer 7.0 and Microsoft Windows XP SP2. Other versions may also be affected.

Solution:
Disable active scripting support.

Other References:
SA19738:
http://secunia.com/advisories/19738/