Apache ActiveMQ 5.x before 5.13.0 does not restrict the classes that can be serialized in the broker, which allows remote attackers to execute arbitrary code via a crafted serialized Java Message Service (JMS) ObjectMessage object.

Apache ActiveMQ could allow a remote attacker to traverse directories on the system, caused by an error in the fileserver upload/download functionality. By placing a jsp file in the admin console, an attacker could exploit this vulnerability to execute arbitrary shell commands on the system.