According to tech support site BleepingComputer, victims can "trick" the program into shutting down: once they reach the PayPal purchase screen, they can hit Ctrl+O to open a dialogue box, and then enter http://hitechnovation.com/thankyou.txt. This makes the program think they've paid the $25, and it shuts down.
A broken U.S. Postal Service API exposed more than 60 million users by allowing a researcher to pull millions of rows of data by sending wildcard requests to the server. The resulting security hole has been patched after repeated requests to the USPS.