# CVE-2020-36856: Nagios XI versions prior to 5.6.14 contain an authenticated remote command execution vulnerability in the CCM…

Source: https://junglewise.ai/threats/cve-2020-36856-nagios-xi-versions-prior-to-5-6-14-contain-an-authenticated  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-30  
License: CC BY 4.0 with a link back

CVE-2020-36856 · Severity: high · CVSS 8.8 · Published 2025-10-30

Nagios XI versions prior to 5.6.14 contain an authenticated remote command execution vulnerability in the CCM command_test.php script. Insufficient validation of the `address` parameter allows an authenticated user with access to the Core Config Manager to inject shell metacharacters that are incorporated into backend command invocations. Successful exploitation enables arbitrary command execution with the privileges of the Nagios XI web application user and may be leveraged to execute commands on the underlying XI host, modify system configuration, or fully compromise the host.

Technologies: [Nagios XI](https://junglewise.ai/threats/technologies/xi). Vendors: [Nagios](https://junglewise.ai/threats/vendors/nagios).

## Quick answers

**Is CVE-2020-36856 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2020-36856 being exploited in the wild.

**How severe is CVE-2020-36856?** High severity, with a CVSS score of 8.8, published 30 October 2025.

**Which products and versions are affected?** Nagios XI. The advisory does not name versions.

**Is there a fix for CVE-2020-36856?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2020-36856?** Check whether you run Nagios XI. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Nagios XI

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- [NagiosXI 2026R1.0.1 build 1762361101 is vulnerable to Directory Traversal in /admin/coreconfigsnapshots.php.](https://junglewise.ai/threats/cve-2025-67254-nagiosxi-2026r1-0-1-build-1762361101-is-vulnerable-to-directory)
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