IBM MQ is vulnerable to information disclosure. The vulnerability exists due to a data leak from an error message within the pre-v7 pubsub logic.
exchange.xforce.ibmcloud.com/vulnerabilities/177402
www.ibm.com/support/pages/node/6252777
www.ibm.com/support/pages/security-bulletin-ibm-mq-appliance-vulnerable-sensitive-information-disclosure-vulnerability-cve-2020-4319
www.ibm.com/support/pages/security-bulletin-ibm-mq-could-leak-sensitive-information-due-error-within-pre-v7-queue-manager-pubsub-logic-cve-2020-4319