Advance Guestbook hacking from the browser name

Hi, my advance guestbook has been hacked again, now the hacker change his browser name for this code "><iframe src="http://tus.jovencitasx.com/hacked/"> and the guestbook show a single message and big frame.

Can someone helpme?

Regars

This is why you should update to 2.3.3

Go into the Admin Section of your Guestbook and delete that post. Then, as Carbonize pointed out, update to 2.3.3

I had the same moron try it on my guestbook at the same time and I'm not even using Advanced Guestbook which proves what a moron they are. You don't really have to update to 2.3.3 as patchng the exploit is simple.

Open lib/add.class.php and find

or it may be

replace it with