An issue was discovered in Couchbase Server through 7.1.4 before 7.1.5 and before 7.2.1. There are Unauthenticated RMI Service Ports Exposed in Analytics.
https://www.couchbase.com/downloads
https://www.couchbase.com/alerts/
https://forums.couchbase.com/tags/security
https://docs.couchbase.com/server/current/release-notes/relnotes.html