[UNIX] CGI-City's CCGuestBook Script Injection Vulnerabilities
From: firstname.lastname@example.org To: email@example.com Date: 30 Mar 2003 16:08:31 +0200
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CGI-City's CCGuestBook Script Injection Vulnerabilities
<http://www.icthus.net/CGI-City/scr_cgicity.shtml#CCGUEST> CCGuestBook is
a "simple guestbook program that is very easy to configure and install. It
features a notification facility which sends an email alert to the
guestbook owner whenever new entries are made. It may also be used as a
post-it board to allow visitors to a web site to just post messages". The
mentioned product has been found to contain a cross-site scripting
vulnerability that would allow a remote attacker posting a Guestbook entry
viewing the Guestbook entry to execute arbitrary commands.
cc_guestbook.pl neglects to filter out user input allowing script
injection to the Guestbook via the "name" and "webpage title" values. The
injected script will be executed in the user's browser whenever he visits
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