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Unlimited miles and nights: Vulnerability found in rewards programs

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Enlarge (credit: Jose A. Bernat Bacete ) Travel rewards programs like those offered by airlines and hotels tout the specific perks of joining their club over others. Under the hood, though, the digital infrastructure for many of these programs—including Delta SkyMiles, United MileagePlus, Hilton Honors, and Marriott Bonvoy—is …