source: https://www.securityfocus.com/bid/15240/info

Invision Gallery is prone to an SQL injection vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input before using it in an SQL query.

Successful exploitation could result in a compromise of the application, disclosure or modification of data, or may permit an attacker to exploit vulnerabilities in the underlying database implementation. 

http://www.example.com/index.php?automodule=gallery&cmd=sc&cat=26&sort_key=date&order_key=DESC&prune_key=30&st='[SQL]