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GitHub - baileywj/CFA-2019-1337: Bruteforcing our way towards ultimate customer satisfaction- free food!

CFA-2019-1337

Bruteforcing our way towards ultimate customer satisfaction- free food! (For Educational Purposes Only, Use at Your Own Discretion)

Analyzing multiple receipts from Chick-fil-As across the country (via Google Images) allowed us to determine (roughly) the pattern used for generating the "Serial Num" occasionally found near the bottom of the customer copy receipt (see example below).

Insecurities in their customer experience portal allow for these serial numbers to be verified as working in rapid succession. Once a given serial number as been verified as working, using a web browser automation library like Selenium, the customer experience survey can be completed automatically (and auto-filled with the email you'd like to have your free sandwich voucher(s) sent to).

Example Serial Num: 6320106-01336-1109-0523-95

Sequence 1 (7-Digits)

Sequence 2 (5-Digits)

Sequence 3 & 4 (4-Digits Each)

Sequence 5 (2-Digits)

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