EverShop vulnerabilities

A DoS vulnerability in evershop 2.1.0 and prior allows unauthenticated attackers to exhaust application server resources via the "GET /images" API. The application fails to limit the height of the use-element shadow tree or the dimensions of pattern tiles during SVG processing, resulting in unbounded resource consumption and system-wide denial of service.

In EverShop, the customer update route is declared as public, causing the admin authentication middleware to call next() without checking the caller, and no customer-session middleware guards the route. An unauthenticated request with a known customer uuid can overwrite the customer's email and password, taking over the account. Version 2.2.1 changes the route to private.

In EverShop up to 2.0.1, manipulation of the uuid argument in Order.resolvers.js of the Order Handler component results in improper control of resource identifiers. The attack can be performed remotely, is of high complexity and difficult exploitability, and the exploit is public.