Yshopmall through 2.0.0 contains an insecure direct object reference vulnerability in the after-sales API that allows authenticated members to access other members' data by supplying their after-sales id and orderCode. Attackers can call deleteAfterSalesOrder, addLogisticsInformation, or GET /applyForAfterSales/{key} to view other members' order items and tamper with or delete their after-sales records.

yshopmall <=3.3 is vulnerable to Cross Site Scripting (XSS). The file upload endpoint /api/upload of the system lacks file type validation. Attackers can upload files of any type, including HTML, JSP, and other executable files.