source: https://www.securityfocus.com/bid/5341/info The vulnerability has been reported for Easy Guestbook 1.0. It is possible for an atttacker to modify any user's guestbook by deleting entries. The vulnerability is the result of Guestbook failing to properly authenticate users who wish to edit guestbooks.

Easy Guestbook v1.0 Vulnerabilities

Delete No. of Entries in Guestbook:
Open Administration Guestbook: