CGIscript.net csMailto.cgi program allows remote attackers to use csMailto as a "spam proxy" and send mail to arbitrary users via modified (1) form-to, (2) form-from, and (3) form-results parameters.
CGIscript.net csMailto.cgi program exports feedback to a file that is accessible from the web document root, which could allow remote attackers to obtain sensitive information by directly accessing the file.