source: http://www.securityfocus.com/bid/24311/info

My DataBook is prone to multiple input-validation vulnerabilities, including cross-site scripting and SQL-injection issues.

Exploiting these issues could allow an attacker to steal cookie-based authentication credentials, compromise the application, access or modify data, or exploit latent vulnerabilities in the underlying database. 

http://www.example.com/apppath/diary.php?month=06&year=2007&day=01&delete=%27 http://www.example.com/apppath/diary.php?month=06&year=2007&day=01&delete=%00'