source: https://www.securityfocus.com/bid/14765/info
PBLang is affected by a directory traversal vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input.
Exploitation of this vulnerability could lead to a loss of confidentiality. Information obtained may aid in further attacks against the underlying system; other attacks are also possible.
http://www.example.com/pblang/setcookie.php?u=../../../../../etc/passwd%00