WordPress Testimonial Slider 1.2.4 SQL Injection

`DefenseCode ThunderScan SAST Advisory: WordPress Testimonial Slider  
Plugin SQL injection Security Vulnerability  
  
  
Advisory ID: DC-2018-01-005  
Advisory Title: WordPress Testimonial Slider Plugin SQL injection  
Security Vulnerability  
Advisory URL: http://www.defensecode.com/advisories.php  
Software: WordPress Testimonial Slider plugin  
Language: PHP  
Version: 1.2.4 and below  
Vendor Status: Vendor contacted, update released  
Release Date: 2018/01/10  
Risk: Medium  
  
  
  
1. General Overview  
===================  
During the security audit of Testimonial Slider plugin for WordPress  
CMS, security vulnerability was 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, Testimonial Slider shows the  
testimonials and feedbacks submitted by your Happy Customers in a  
clean, responsive and beautiful Slider format. The "Testimonials" are  
a Custom Post Type so it is very easy to add, modify and delete  
testimonials.  
  
According to wordpress.org, it has more than 10 000 active installs.  
  
Homepage:  
https://wordpress.org/plugins/testimonial-slider/  
http://slidervilla.com/testimonial-slider/  
  
  
3. Vulnerability Description  
============================  
During the security analysis, ThunderScan discovered  
SQL injection vulnerability in Testimonial Slider WordPress plugin.  
  
The easiest way to reproduce the vulnerability is to visit the  
provided URL while being logged in as administrator or another user  
that is authorized to access the plugin settings page. Users that do  
not have full administrative privileges could abuse the database  
access the vulnerability provides to either escalate their privileges  
or obtain and modify database contents they were not supposed to be  
able to.  
  
Due to the missing nonce token, the vulnerable code is also directly  
exposed to attack vectors such as Cross Site request forgery (CSRF).  
  
3.1. SQL injection  
Function: $wpdb->query();  
Variable: POST['current_slider_id'];  
Vulnerable URL:  
http://vulnerablesite.com/wp-admin/admin.php?page=testimonial-slider-admin  
File: smooth-slider-forks\testimonial-slider\settings\sliders.php  
---------  
60 $slider_id=$_POST['current_slider_id'];  
...  
63 $sql = 'UPDATE '.$table_name.' SET slide_order='.$i.' WHERE  
post_id='.$slide_order.' and slider_id='.$slider_id;  
64 $wpdb->query($sql);  
---------  
  
  
4. Solution  
===========  
After the vulnerability was reported the vendor resolved the security  
issues. All users are strongly advised to update WordPress Testimonial  
Slider plugin to the latest available version.  
  
  
5. Credits  
==========  
Discovered by Neven Biruski using DefenseCode ThunderScan source code  
security analyzer.  
  
  
6. Disclosure Timeline  
======================  
2016/11/11 Vulnerability discovered  
2017/03/31 Vendor contacted  
2017/04/28 Vendor contacted  
2017/05/08 Vendor responded  
2018/01/10 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/  
`