OGUsers (2020 breach) - 263,189 breached accounts

In April 2020, the account hijacking and SIM swapping forum OGUsers suffered their second data breach in less than a year. As with the previous breach, the exposed data included email and IP addresses, usernames, private messages and passwords stored as salted MD5 hashes. A total of 263k email addresses across user accounts and other tables were posted to a rival hacking forum.