source: http://www.securityfocus.com/bid/15837/info
  
PhpWebGallery is prone to multiple SQL-injection vulnerabilities because the application fails to properly sanitize user-supplied input before using it in SQL queries.
  
A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database. 

http://www.example.com/picture.php?cat=best_rated&image_id=[SQL] 