Multiple SQL Injection vulnerabilities in Teachers Record Management System 1.0 thru 2.1 allow remote authenticated users to execute arbitrary SQL commands via the 'editid' GET parameter in edit-subjects-detail.php, edit-teacher-detail.php, or the 'searchdata' POST parameter in search.php.
https://www.exploit-db.com/exploits/50018
https://phpgurukul.com/teachers-record-management-system-using-php-and-mysql/