CommuniGate Pro 6.2 allows stored XSS via a message body in Pronto! Mail Composer, which is mishandled in /MIME/INBOX-MM-1/ if the raw email link (in .txt format) is modified and then renamed with a .html or .wssp extension.
- http://packetstormsecurity.com/files/149916/CommuniGatePro-Pronto-Webmail-6.2-Cross-Site-Scripting.html
No PoCs found on GitHub currently.