Guestbook 4.0 Sensitive Information Disclosure Weakness

                                                source: http://www.securityfocus.com/bid/7320/info

Guestbook has been reported prone to a sensitive information disclosure weakness.

An attacker may disclose sensitive information regarding the Super Guestbook install by sending a HTTP request for the Guest Book passwd file. Administration credentials are displayed in the attacker's browser. 

http://www.example.com/cgi-bin/guestbook/passwd