Tavis Ormandy released an exploit for the “Windows Help Center” of Windows XP ServicePack 2 and ServicePack 3.
By just clicking on an malicious link you can get exploited by an attacker.
The exploit uses a security hole in the Help Center of Windows XP. It’s a Cross-Site Script attack
For further informations how to prevent against this attack or how to use this attack goto: http://www.hardez.de