Apache ActiveMQ could allow a remote attacker to execute arbitrary code on the system, caused by an error in the Fileserver web application. By sending a specially crafted HTTP PUT request and an HTTP MOVE request, an attacker could exploit this vulnerability to create an arbitrary file and execute arbitrary code on the system.

Apache ActiveMQ could allow a remote attacker to obtain sensitive information, caused by an XML External Entity Injection (XXE) error when processing XML data. By sending specially-crafted XML data to specify an XPath based selector, an attacker could exploit this vulnerability to obtain sensitive information.

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.