Campcodes/SourceCodester Courier Management System ajax.php signup sql injection

A security flaw has been discovered in Campcodes/SourceCodester Courier Management System 1.0. Affected by this issue is the function Signup of the file /ajax.php. Performing manipulation of the argument lastname results in sql injection. It is possible to initiate the attack remotely. The exploit has been released to the public and may be exploited.