An issue was discovered in Couchbase Server before 7.2.x before 7.2.4. otpCookie is shown with full admin on pools/default/serverGroups and engageCluster2.
https://www.couchbase.com/alerts/
https://forums.couchbase.com/tags/security
https://docs.couchbase.com/server/current/release-notes/relnotes.html