More than five billion records were exposed after an Elasticsearch “data breach database” managed by a U.K.-based security firm and housing a trove of security incidents from the last seven years was left unprotected.

“Data was very well structured,” wrote security researcher Bob Diachenko, who discovered the Elasticsearch instance, of the information, which included hashtypes, leak dates, passwords, email addresses, email domains and leak sources.

Diachenko said he was able to confirm some of the “prominent” leaks in the database, such as Adobe, Last.fm, Twitter, LinkedIn, Tumbler and VK.

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