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WordPress Contact Form To Email 1.1.47 Cross Site Scripting

WordPress Contact Form To Email 1.1.47 Cross Site Scripting
Posted Jul 25, 2016
Authored by Burak Kelebek

WordPress Contact Form to Email plugin version 1.1.47 suffers from a cross site scripting vulnerability.

tags | exploit, xss
MD5 | c93c86885ecc45c0e71ea585934a0b17

WordPress Contact Form To Email 1.1.47 Cross Site Scripting

Change Mirror Download
------------------------------------------------------------------------
Cross-Site Scripting in Contact Form to Email WordPress Plugin
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Burak Kelebek, July 2016

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Abstract
------------------------------------------------------------------------
A reflected Cross-Site Scripting (XSS) vulnerability has been found in
the Contact Form to Email WordPress Plugin. By using this vulnerability
an attacker can inject malicious JavaScript code into the application,
which will execute within the browser of any logged-in admin who views
the link in the proof of concept below.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160721-0003

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on Contact Form to Email version
1.1.47.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
This issue is fixed in Contact Form to Email version 1.1.48.

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

Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are injected into otherwise benign and trusted web sites. XSS attacks occur when an attacker uses a web application to send malicious code, generally in the form of a browser side script, to a different end user. Flaws that allow these attacks to succeed are quite widespread and occur anywhere a web application uses input from a user within the output it generates without validating or encoding it. Reflected XSS occurs when user input is immediately returned by a web application in an error message, search result, or any other response that includes some or all of the input provided by the user as part of the request

"cal" field does not validate <script> tags and does not perform output encoding.

contact-form-to-email/cp-admin-int-message-list.inc.php:

85: echo echo $_GET['cal'];

Proof of concept

http://<target>/wp-admin/options-general.php?page=cp_contactformtoemail&cal=foobar%3B%3Cscript%3Ealert%281%29%3C%2Fscript%3E&list=1&status=status&lu=id&r=1


------------------------------------------------------------------------
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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