source: https://www.securityfocus.com/bid/9689/info

Owl's Workshop is reported prone to multiple remote file-disclosure vulnerabilities because the application fails to validate user-supplied input passed via a URI parameter. 

Upon successful exploitation of these issues, an attacker may be able to gain access to sensitive system files, potentially facilitating further attacks.

http://www.example.org/owls/multiplechoice/index.php?file=../../../../../../../../../../../../../../../etc/passwd&view=print