The getObject method of the javax.jms.ObjectMessage class in the (1) JMS Core client, (2) Artemis broker, and (3) Artemis REST component in Apache ActiveMQ Artemis before 1.4.0 might allow remote authenticated users with permission to send messages to the Artemis broker to deserialize arbitrary objects and execute arbitrary code by leveraging gadget classes being present on the Artemis classpath.

The org.apache.catalina.connector.Response.encodeURL method in Red Hat JBoss Web 7.1.x and earlier, when the tracking mode is set to COOKIE, sends the jsessionid in the URL of the first response of a session, which allows remote attackers to obtain the session id (1) via a man-in-the-middle attack or (2) by reading a log.