Bdtask/CodeCanyon Isshue Multi Store eCommerce Shopping Cart Solution submit_checkout behavioral workflow

A security vulnerability has been detected in Bdtask/CodeCanyon Isshue Multi Store eCommerce Shopping Cart Solution 5. Affected by this issue is some unknown functionality of the file /submit_checkout. Such manipulation of the argument order_total_amount/cart_total_amount leads to enforcement of behavioral workflow. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.