Two Australians took advantage of vulnerability in McDonald’s delivery system to order food free.
Amateur hackers uploaded video of them ordering 11 hamburgers while the system did not charge them. Clip reached 1.9 million views.As it is clear from the video, two friends orders ten hamburgers $1 each through the terminal that enables payment for the order without waiting in the query. Next, with the “Customize” option they refused meatballs that subtracted $1.1 from the price of each hamburger. Finally, the sum of the order became negative (-$1). When they ordered a hamburger without refusing a meatball, total score became $0.0.
According to the comments, this trick does not work in Germany and US. Due to variations in software, vulnerability may be impossible to repeat in some McDonalds restaurants.
Source: https://www.delish.com/food-news/a27091162/mcdonalds-kiosks-free-burger-hack/
