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An unrestricted file upload issue in HorizontCMS through 1.0.0-beta allows an authenticated remote attacker (with access to the FileManager) to upload and execute arbitrary PHP code by uploading a PHP payload, and then using the FileManager's rename function to provide the payload (which will receive a random name on the server) with the PHP extension, and finally executing the PHP file via an HTTP GET request to /storage/<php_file_name>. NOTE: the vendor has patched this while leaving the version number at 1.0.0-beta.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/multi/http/horizontcms_upload_exec.rb) that exploits an arbitrary file upload vulnerability (CVE-2020-27387) in HorizontCMS 1.0.0-beta. The exploit requires valid credentials for a user with FileManager permissions. It works by authenticating to the CMS, uploading a malicious PHP file via /admin/file-manager/fileupload, renaming it via /admin/file-manager/rename, and then executing it via /storage/<payload_name>. The module supports PHP, Linux, and Windows targets, delivering either a Meterpreter reverse shell or a simple web shell for command execution. Cleanup is performed by deleting the payload via /admin/file-manager/delete. The code is written in Ruby and is fully integrated into the Metasploit framework, making it a weaponized exploit. The attack vector is network-based, targeting web-accessible endpoints of HorizontCMS.
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