CVE-2018-18621: Communigate Pro

Medium severity, CVSS 6.1. EPSS: 1.1% chance of exploitation in the next 30 days.

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.

Affected products

• Communigate Communigate Pro: version 6.2 only

Published 2018-10-24. Last modified 2026-06-17.