The Ubuntu online forums have been hacked and the username, IP address, and email address of over two million users have been exposed. The data breach was caused by the failure in applying a patch to the Ubuntu forums. The attackers used the above access to download portions of the user table containing data belonging more than 2 Million users. The passwords belonging to the forums were Hashed and Salted as the Forums rely on Ubuntu Single Sign On for logins. The incident raised a heated discussion about Canonicals responsibility for the very bad patch management.”]
Source: https://securityaffairs.co/wordpress/49388/data-breach/ubuntu-online-forums-hacked.html