I've just found a pretty ugly hole in view-source cgi-shell script.

   This script, which can be found  on some httpd distributions and
   in SCO Skunkware cdroms, is designed to display a given document
   located in $DOCUMENT_ROOT/$1 (where $DOCUMENT_ROOT is an
   environment variable set by the server).

Unhopefully view-source does not properly check the arguments.

   It is therefore possible to display any file on systems where
   view-source is world executable by sending something like

'http://www.server.com/cgi-bin/view-source?../../../../../../../etc/passwd'



  Obviously this kind of so-called cgi has nothing to do in
  your cgi-bin directory... Maybe a day cgi will be secure ;)