The cybersecurity community and Capitol Hill are watching closely.

The plaintiff, a U.K. resident, is seeking unspecified damages.

It's the second significant security incident to hit the hospitality giant in the last 16 months.

It's one of the first bug bounty programs by a major hospitality brand.

The breach is the one of the largest ever reported and is under investigation by at least five U.S. states as well as European regulators.

It's another piece of data that can be used to sell "fullz," or full stolen profiles used to commit identity theft.