IBM MQ Console allows authenticated non-administrative users to create and start queue managers due to improper authorization checks.
This issue was addressed under Known Issue DT472093
IBM MQ version 9.3 LTS
Apply cumulative security update 9.3.0.42
IBM MQ version 9.4 LTS
Apply cumulative security update 9.4.0.26
IBM MQ version 9.3 CD, 9.4 CD and 10.0.0.0
Upgrade to IBM MQ version 10.0.0.5