Nessus 2.0.10a stores account passwords in plaintext in .nessusrc files, which allows local users to obtain passwords. NOTE: the original researcher reports that the vendor has disputed this issue
https://exchange.xforce.ibmcloud.com/vulnerabilities/15644
http://securitytracker.com/id?1009575
http://archives.neohapsis.com/archives/fulldisclosure/2004-03/1363.html