Exposed databases are all too common, but this one may be more serious than most. Researchers at UpGuard discovered that the Australian market analysis firm Tetrad left data for 120 million households exposed in Amazon S3 storage. It appeared to be a blend of data from providers like Experian Mosaic, Claritas/Nielsen's PRIZM as well as Tetrad customers like Chipotle, Kate Spade and Bevmo. The info varied from source to source, but frequently included sensitive details like names, addresses and purchasing habits. Experian Mosaic's data, for example, sorted users into types based on factors like income.