> Business logic errors, also known as business logic flaws, are a type of application vulnerability that stems from the application's business logic, which is the part of the program that deals with real-world business rules and processes. These rules could include things like pricing models, transaction limits, or the sequences of operations that need to be followed in a multi-step process.
Source: Business Logic Errors/README.md in PayloadsAllTheThings. From PayloadsAllTheThings by Swissky and contributors. MIT License, Copyright (c) 2019 Swissky.