A vulnerability was found in SourceCodester Simple E-Learning System 1.0. It has been rated as critical. This issue affects some unknown processing of the file classRoom.php. The manipulation of the argument classCode with the input 1'||(SELECT 0x6770715a WHERE 8795=8795 AND (SELECT 8342 FROM(SELECT COUNT(*),CONCAT(0x7171786b71,(SELECT (ELT(8342=8342,1))),0x717a7a7671,FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.PLUGINS GROUP BY x)a))||' leads to sql injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.