Beijing Yunfan Internet Technology
Yunfan Learning Examination System
A critical vulnerability was found in the Beijing Yunfan Internet Technology Yunfan Learning Examination System. The issue affects an unknown functionality of the file `src/main/java/com/yf/exam/modules/sys/user/controller/SysUserControl` of the JWT Token Handler component, leading to improper authentication. The attack can be launched remotely, with a rather high complexity, making exploitation difficult. The exploit has been disclosed to the public and may be used.