263K accounts from OGUsers (2020 breach) (ogusers.com) were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Email addressesIP addressesPasswordsPrivate messagesUsernames
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.
Source: Have I Been Pwned (CC BY 4.0)