MacCMS 6. x-referer improper handling of initiator injection-vulnerability warning-the black bar safety net

/user/service.php function Popularize global $db; $userid = safeData"userid","get"; if ! isNum$userid die"user illegal,please, from the new login!"; $Ip = getip; $Ly = $SERVER"HTTPREFERER"; $row = $db-getRow"select from tbluser where uid=" . $userid .""; if $row $sql="Select From tbluservisit whe...