SEMCMS 4.8 is vulnerable to Incorrect Access Control. The code installs SEMCMS_Funtion.php before checking if the admin is a valid user in the admin page because authentication function is called from there, users gain admin privileges.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: