What is Elasticsearch and why is it involved in so many data leaks?

The term Elasticsearch is never far away from the news headlines and usually for the wrong reasons. Seemingly every week that goes by brings a new story about an Elasticsearch server that has been breached, often resulting in troves of data being exposed. But why are so many breaches originating from Elasticsearch buckets, and how can businesses that leverage this technology use it to its fullest extent while still preventing a data leak?

To answer these questions, firstly, one must understand what Elasticsearch is. Elasticsearch is an open source search and analytics engine as well as a data store developed by Elastic. 

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