CVE-2020-7357

CRITICAL

Cayin CMS - Authenticated OS Command Injection via NTP_Server_IP Parameter

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-7357. PoCs published by h00die, Gjoko Krstic (LiquidWorm) <[email protected]>, including Metasploit module exploits/linux/http/cayin_cms_ntp.

AI-analyzed exploit summary This Metasploit module exploits an authenticated RCE vulnerability in Cayin CMS <= 11.0 via command injection in the 'ntpIp' parameter of the system_service.cgi file. It uses a cmdstager to execute a reverse shell payload in chunks due to field size limitations.

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.

Exploits (1)

metasploit WORKING POC EXCELLENT
by h00die, Gjoko Krstic (LiquidWorm) <[email protected]> · rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/cayin_cms_ntp.rb

This Metasploit module exploits an authenticated RCE vulnerability in Cayin CMS <= 11.0 via command injection in the 'ntpIp' parameter of the system_service.cgi file. It uses a cmdstager to execute a reverse shell payload in chunks due to field size limitations.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Cayin CMS <= 11.0
Auth required
Prerequisites: Valid credentials for Cayin CMS · Network access to the target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2020-5570.php
Third Party Advisory, VDB Entry vendor-advisory x_refsource_ibm
https://exchange.xforce.ibmcloud.com/vulnerabilities/182925

Scores

CVSS v3 9.6
EPSS 0.3387
EPSS Percentile 98.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Details

CWE
CWE-78
Status published
Products (8)
cayintech/cms 7.5 11175
cayintech/cms 8.0 11175
cayintech/cms 8.2 12199
cayintech/cms-20_firmware 9.0 14197 (2 CPE variants)
cayintech/cms-40_firmware 9.0 14197 (3 CPE variants)
cayintech/cms-60_firmware 11.0 19025
cayintech/cms-se-lxc_firmware
cayintech/cms-se_firmware 11.0 19179 (3 CPE variants)
Published Aug 06, 2020
Tracked Since Feb 18, 2026