This indicates an attack attempt against a Directory Traversal vulnerability in Apache Jetspeed Portal Site Manager.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application while handling maliciously crafted requests. A remote attacker can exploit this to execute arbitrary code within context of the affected application via a crafted request.
Apache Software Foundation Jetspeed 2.2.0 to 2.2.2
Apache Software Foundation Jetspeed 2.3.0
System Compromise: Remote attackers can execute arbitrary code in the context of the affected user
Apply the most recent upgrade or patch from the vendor