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Monstra CMS 3.0.4 Remote Code Execution

Monstra CMS 3.0.4 Remote Code Execution
Posted May 15, 2018
Authored by Jameel Nabbo

Monstra CMS version 3.0.4 suffers from a shell upload remote code execution vulnerability.

tags | exploit, remote, shell, code execution
advisories | CVE-2018-9037
MD5 | 0525bf838887d360c20e311c2ea4a509

Monstra CMS 3.0.4 Remote Code Execution

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# Exploit Title: Monstra CMS 3.0.4 Upload Plugin Remote code execution CVE-2018-9037
# Date: 2018-05-14
# Exploit Author: Jameel Nabbo
# Vendor Homepage: https://github.com/monstra-cms/monstra
# Software Link: https://github.com/monstra-cms/monstra
# Version: 3.0.4
# Tested on: MAC OSX
# CVE :CVE-2018-9037


Monstra CMS 3.0.4 allows remote code execution via an upload_file request for a .zip file,
which is automatically extracted and may contain .php files.


Steps to Reproduce
1: Log in as a user with page editing permissions
2: Upload a plugin archive containing php webshell code
3: After successful upload we can execute the command.

Then go to: http://127.0.0.1/plugins/{Name_Of_Zip_File_You_Uploaded}/{File_In_Zip}.php

Solution
Filter plugin content during plugin upload


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