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.

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 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 is vulnerable to a brute force attack, caused by an error in the LDAPLoginModule implementation. An attacker could exploit this vulnerability using the wildcard in usernames to obtain user credentials.

Apache ActiveMQ could allow a remote authenticated attacker to bypass security restrictions, caused by an error in the LDAPLoginModule implementation. By sending an empty password, an attacker could exploit this vulnerability to bypass the authentication mechanism of an application using LDAPLoginModule and assume the role of another user.

Apache ActiveMQ could allow a remote attacker to hijack the clicking action of the victim, caused by the failure to set the X-Frame-Options header in HTTP responses by the Administrative Web console. By persuading a victim to visit a malicious Web site, a remote attacker could exploit this vulnerability to hijack the victim's click actions.

Apache ActiveMQ is vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the web based administration console. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.

Apache ActiveMQ before 5.6.0 allows remote attackers to cause a denial of service (file-descriptor exhaustion and broker crash or hang) by sending many openwire failover:tcp:// connection requests.

Apache ActiveMQ is vulnerable to cross-site scripting, caused by improper validation of user-supplied input. A remote attacker could exploit this vulnerability using a specially-crafted URL to execute script in a victim's Web browser within the security context of the hosting Web site, once the URL is clicked. An attacker could use this vulnerability to steal the victim's cookie-based authentication credentials.