Bugzilla 2.14 before 2.14.2, and 2.16 before 2.16rc2, directs error messages from the syncshadowdb command to the HTML output, which could leak sensitive information, including plaintext passwords, if syncshadowdb fails.
http://www.securityfocus.com/bid/4964
http://www.redhat.com/support/errata/RHSA-2002-109.html
http://www.iss.net/security_center/static/9306.php
http://bugzilla.mozilla.org/show_bug.cgi?id=92263
http://archives.neohapsis.com/archives/bugtraq/2002-06/0054.html