HaveIBeenPwned.com reports an unsecured file on a RootsWeb server containing email addresses/ username and password combinations as well as usernames from a Roots.com server An Ancestry.com security team reviewed the file identified by Troy Hunt, and determined that it does contain login details for 300,000 accounts although they describe, the majority of the information was olds The company also hosts servers for RootsWeb, a free, community-driven collection of genealogy tools and discussion forums.”]
Source: https://securityaffairs.co/wordpress/67198/data-breach/ancestry-com-data-breach.html