A forum dedicated to social engineering topics was breached about two weeks ago and data from tens of thousands of members leaked online on the very same day of the hack. The data from SocialEngineered.net was dumped on a hacker forum on June 13. The dump affects 55,121 users of the social engineering forum and includes their usernames, passwords stored as salted MD5 hashes, email addresses, IP addresses, and private messages. The leak also contained the website source code, data, and activity.
Source: https://www.bleepingcomputer.com/news/security/social-engineering-forum-hacked-data-shared-on-leak-sites/