Apache ActiveMQ contains a deserialization of untrusted data vulnerability that may allow a remote attacker with network access to a broker to run shell commands by manipulating serialized class types in the OpenWire protocol to cause the broker to instantiate any class on the classpath.

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.