SourceCodester Best House Rental Management System ajax.php cross site scripting

A vulnerability, which was classified as problematic, has been found in SourceCodester Best House Rental Management System 1.0. This issue affects some unknown processing of the file /rental/ajax.php?action=save_tenant. The manipulation of the argument lastname/firstname/middlename leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Other parameters might be affected as well.