Bugzilla 2.17.5 through 2.17.7 embeds the password in an image URL, which could allow local users to view the password in the web server log files.
https://exchange.xforce.ibmcloud.com/vulnerabilities/16669
https://euvd.enisa.europa.eu/vulnerability/EUVD-2004-0705
http://www.securityfocus.com/bid/10698