Researchers find bugs in some mobile card readers from Square, SumUp, iZettle, and PayPal that allow manipulation or remote control via Bluetooth or mobile apps (Lily Hay Newman/Wired)

Lily Hay Newman / Wired:
Researchers find bugs in some mobile card readers from Square, SumUp, iZettle, and PayPal that allow manipulation or remote control via Bluetooth or mobile apps  —  THE TINY, PORTABLE credit card readers you use to pay at farmer’s markets, bake sales, and smoothie shops are convenient for consumers and merchants alike.