TIBCO RendezVous 7.4.11 and earlier logs base64-encoded usernames and passwords in rvrd.db, which allows local users to obtain sensitive information by decoding the log file.
https://www.exploit-db.com/exploits/2284
https://euvd.enisa.europa.eu/vulnerability/EUVD-2006-4664
http://www.vupen.com/english/advisories/2006/3497