Update the WordPress School Management Pro premium plugin to the latest available version (at least 9.9.7).
Jetpack Scan Team and WordPress elevated support team discovered and reported this Remote Code Execution (RCE) vulnerability in WordPress School Management Pro Plugin. This could allow a malicious actor to execute commands on the target website. This can be used to gain backdoor access to then take full control of the website. This vulnerability has been fixed in version 9.9.7.