Rapid7 Vulnerability & Exploit Database

Monitorr unauthenticated Remote Code Execution (RCE)

Back to Search

Monitorr unauthenticated Remote Code Execution (RCE)



This module exploits an arbitrary file upload vulnerability and achieving an RCE in the Monitorr application. Using a specially crafted request, custom PHP code can be uploaded and injected through endpoint upload.php because of missing input validation. Any user privileges can exploit this vulnerability and it results in access to the underlying operating system with the same privileges under which the web services run (typically user www-data). Monitorr 1.7.6m, 1.7.7d and below are affected.


  • h00die-gr3y <h00die.gr3y@gmail.com>
  • Lyhins Lab




cmd, php, x64, x86


Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use exploit/multi/http/monitorr_webshell_rce_cve_2020_28871
msf exploit(monitorr_webshell_rce_cve_2020_28871) > show targets
msf exploit(monitorr_webshell_rce_cve_2020_28871) > set TARGET < target-id >
msf exploit(monitorr_webshell_rce_cve_2020_28871) > show options
    ...show and set options...
msf exploit(monitorr_webshell_rce_cve_2020_28871) > exploit

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security