.:. Fantastic Guestbook v2.0.1 Advisory .:.
July, 11 2006
Fantastic Guestbook v2.0.1
Fantastic GuestBook version 2.0.1 is simple GuestBook; where remote user without authentication can post their own message. No authentication is required! Every body can post message.
Fantastic GuestBook version 2.0.1 is affected by a Remote XSS Vulnerability. Some variables are not properly sanitized before being used. Here you will find the variables not properly sanitized:
If a malicious people go into the sign in form and put in the fields First Name, Last Name and Nick Name a code like this:
When you load the page http://127.0.0.1/[path]/guestbook.php or you read the messages of the guestbook you will se a pop-up that "say" 'XSS'.
July, 2006/11 - Not Informed!
At the moment (July, 2006/11) there are no solutions from the vendor. If you want to make sure the code and your GuestBook you have to sanitize the variables: firs_name last_name nick_name
omnipresent omnipresent[at]email[dot]it http://it.security.netsons.org