Improper Payment Validation in PayTR's PayTR Virtual Pos iFrame API WHMCS Module

{
                    "vendor": "PayTR Payment and Electronic Money Institution Inc.",
                    "product": "PayTR Virtual Pos iFrame API WHMCS Module",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "v9.0.0",
                            "lessThan": "v9.0.3",
                            "versionType": "custom"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }