Description
The JMX server embedded in Apache James, also used by the command line client is exposed to a java de-serialization issue, and thus can be used to execute arbitrary commands. As James exposes JMX socket by default only on local-host, this vulnerability can only be used for privilege escalation. Release 3.0.1 upgrades the incriminated library.
Remediation
References
http://www.securityfocus.com/bid/101532
https://www.mail-archive.com/server-user%40james.apache.org/msg15633.html