IBM WebSphere Application Server 5.0.2 and earlier, 5.1.1 and earlier, and 6.0.2 up to 6.0.2.7 records user credentials in plaintext in addNode.log, which allows attackers to gain privileges.
http://www.vupen.com/english/advisories/2006/1736
http://www-1.ibm.com/support/search.wss?rs=0&q=PK16492&apar=only
http://www-1.ibm.com/support/docview.wss?rs=180&uid=swg24012064
http://www-1.ibm.com/support/docview.wss?rs=180&uid=swg24012009
http://www-1.ibm.com/support/docview.wss?rs=180&uid=swg24011773
http://securityreason.com/securityalert/910
http://secunia.com/advisories/20032
http://archives.neohapsis.com/archives/bugtraq/2006-05/0175.html