Donglight Bookstore电商书城系统说明
A critical issue has been found in the `uploadPicture` function of the `AdminBookController` class, located in the file `src/main/java/org/zdd/bookstore/web/controller/admin/AdminBookController.java`. The manipulation of the `pictureFile` argument leads to unrestricted upload. This issue can be exploited remotely. The exploit has been publicly disclosed and may be used.