A vulnerability was found in SourceCodester Prison Management System 1.0. It has been rated as critical. This issue affects some unknown processing of the file /pms/admin/visits/view_visit.php of the component Visit Handler. The manipulation of the argument id with the input 2%27and%201=2%20union%20select%201,2,3,4,5,6,7,user(),database()--+ leads to sql injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.