8.11K accounts from Vermillion (v3rmillion.net) were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Dates of birthEmail addressesIP addressesPasswordsUsernames
In August 2014, the Roblox hacking forum Vermillion suffered a data breach that exposed over 8k subscriber records. The breach of the MyBB forum exposed email and IP addresses, usernames, dates of birth and salted password hashes.
Source: Have I Been Pwned (CC BY 4.0)