This indicates an attack attempt to exploit a Cross-Site Scripting vulnerability in Red Hat JBoss BPM Suite and JBoss BRMS.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application when handling a crafted HTTP request. A remote attacker can exploit this to execute arbitrary script code within the context of the user's browser.
Red Hat JBoss BPMS prior to 6.4.3
Red Hat JBoss BRMS prior to 6.4.3
System Compromise: Remote attackers can execute arbitrary script code within the context of the target user's browser
Apply patch available from the website.