2.52M accounts from Chatbooks (chatbooks.com) were exposed in this breach. Besides email addresses, it included passwords, which makes it a high-risk breach.
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Email addressesNamesPasswordsPhone numbersSocial media profiles
In March 2020, the photo print service Chatbooks suffered a data breach which was subsequently put up for sale on a dark web marketplace. The breach contained 15 million user records with 2.5 million unique email addresses alongside names, phone numbers, social media profiles and salted SHA-512 password hashes. The data was provided to HIBP by dehashed.com.
Source: Have I Been Pwned (CC BY 4.0)