134K accounts from WHMCS (whmcs.com) were exposed in this breach. Besides email addresses, it included partial credit card data and passwords, which makes it a high-risk breach.
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Email addressesEmail messagesEmployersIP addressesNamesPartial credit card dataPasswordsPayment historiesPhysical addressesWebsite activity
In May 2012, the web hosting, billing and automation company WHMCS suffered a data breach that exposed 134k email addresses. The breach included extensive information about customers and payment histories including partial credit card numbers.
Source: Have I Been Pwned (CC BY 4.0)