WordPress All In One Schema.org Rich Snippets 1.4.1 XSS

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DefenseCode ThunderScan SAST Advisory  
WordPress All In One Schema.org Rich Snippets Plugin  
Security Vulnerability  
  
  
Advisory ID: DC-2017-01-002  
Advisory Title: WordPress All In One Schema.org Rich Snippets Plugin  
Security Vulnerability  
Advisory URL: http://www.defensecode.com/advisories.php  
Software: WordPress All In One Schema.org Rich Snippets Plugin  
Language: PHP  
Version: 1.4.1 and below  
Vendor Status: Vendor contacted, update released  
Release Date: 2017/05/24  
Risk: Medium  
  
  
  
1. General Overview  
===================  
During the security audit of All In One Schema.org Rich Snippets  
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 developers, All In One Schema.org Rich Snippets is a  
WordPress plugin that is made to boost CTR, improve SEO and rankings,  
and support most of the content type. The authors claim it works  
perfectly with Google, Bing, Yahoo & Facebook.  
  
According to wordpress.org, it has more than 50,000 active installs.  
  
Homepage:  
https://wordpress.org/plugins/all-in-one-schemaorg-rich-snippets/  
https://www.brainstormforce.com/  
  
  
3. Vulnerability Description  
==================================  
During the security analysis, ThunderScan discovered Cross-Site  
Scripting vulnerability in All In One Schema.org Rich Snippets  
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: $_GET['bsf_send_label']  
Vulnerable URL:   
http://vulnerablesite.com/wp-admin/admin.php?page=rich_snippet_dashboard&bsf_force_send=true&bsf_send_label=<%2Fscript><script>alert(1)<%2Fscript>  
File: all-in-one-schemaorg-rich-snippets\init.php  
---------  
466 $label = $_GET['bsf_send_label'];  
...  
471 $('td.savesend input').val('<?php echo $label; ?>');  
---------  
  
  
4. Solution  
===========  
Vendor resolved the security issues after we reported the  
vulnerability. All users are strongly advised to update WordPress All  
In One Schema.org Rich Snippets plugin to the latest available version  
  
  
5. Credits  
==========  
Discovered with DefenseCode ThunderScan Source Code Security Analyzer  
by Neven Biruski.  
  
  
6. Disclosure Timeline  
======================  
2017/03/28 Vendor contacted  
2017/03/29 Vendor responded  
2017/05/24 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/  
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