BEA WebLogic 7.0 through 7.0 SP6, 8.1 through 8.1 SP4, and 9.0 initial release does not encrypt passwords stored in the JDBCDataSourceFactory MBean Properties, which allows local administrative users to read the cleartext password.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2007-0409
http://www.vupen.com/english/advisories/2007/0213
http://www.securityfocus.com/bid/22082
http://securitytracker.com/id?1017525