Improper Input Validation
Shopware is an open-source commerce platform based on Symfony Framework and Vue js. In affected versions through 22.214.171.124, It was possible to put the same line item multiple times in the cart using the AP. The Cart Validators checked the line item's individuality and the user was able to bypass quantity limits in sales. Users on major versions 6.1, 6.2, and 6.3 may also obtain this fix via a plugin.
CWE-20 - Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.