Southsoft GMIS 5.0 is vulnerable to CSRF attacks. Attackers can access other users’ private information such as photos through CSRF. For example: any student’s photo information can be accessed through /gmis/(S())/student/grgl/PotoImageShow/?bh=. Among them, the code in  is a random string generated according to the user’s login related information. It can protect the user’s identity, but it can not effectively prevent unauthorized access. The code in  is the student number of any student. The attacker can carry out CSRF attack on the system by modifying  without modifying .