From https://jira.jboss.org/jira/browse/JBPAPP-2872

Twiddle logs all command line arguments, including the JMX password to twiddle.log. This log is publicly readable and is created in the current directory.

Multiple cross-site scripting (XSS) vulnerabilities in the Web Console in the Application Server in Red Hat JBoss Enterprise Application Platform (aka JBoss EAP or JBEAP) 4.2.0 before 4.2.0.CP08, 4.2.2GA, 4.3 before 4.3.0.CP07, and 5.1.0GA allow remote attackers to inject arbitrary web script or HTML via the (1) monitorName, (2) objectName, (3) attribute, or (4) period parameter to createSnapshot.jsp, or the (5) monitorName, (6) objectName, (7) attribute, (8) threshold, (9) period, or (10) enabled parameter to createThresholdMonitor.jsp. NOTE: some of these details are obtained from third party information.

Cross-site scripting (XSS) vulnerability in JMX-Console in JBossAs in Red Hat JBoss Enterprise Application Platform (aka JBoss EAP or JBEAP) 4.2 before 4.2.0.CP08 and 4.3 before 4.3.0.CP07 allows remote attackers to inject arbitrary web script or HTML via the filter parameter, related to the key property and the position of quote and colon characters.