Email addresses and passwords of around 97,000 users who tested early builds of Bugzilla bug tracking software were exposed for three months following a server migration. This is the second accidental data disclosure incident reported this month that affects one of the projects supported by the Mozilla Foundation. The database dump files were left in an unprotected location on a server for around three months beginning May 4th. The files had been generated during the migration of a testing server for Bugzilla builds of the Bugzilla project’s software.”]
Source: https://www.csoonline.com/article/2600140/mozilla-reports-user-data-leak-from-bugzilla-project.html