9.5 billion rows of email metadata leaked by Shanghai Jiao Tong University

Justin Paine reports:

While searching Shodan, I recently discovered an ElasticSearch database without any authentication. This database contained metadata related to a huge amount of emails. It was eventually confirmed that this server and the email metadata was controlled by a large university located in China. I would like to thank the university’s security team for their prompt action to secure this data once notified. As far as I am aware they have not notified the impacted students though.

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