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CVE-2025-66404

6.4 · MEDIUM

MCP Server Kubernetes is an MCP Server that can connect to a Kubernetes cluster and manage it.

Published Dec 3, 2025CWE-77EPSS 1.48%

Overview

CVE-2025-66404 is a medium-severity vulnerability. It was published on December 3, 2025 and has a CVSS 3.1 base score of 6.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

MCP Server Kubernetes is an MCP Server that can connect to a Kubernetes cluster and manage it. Prior to 2.9.8, there is a security issue exists in the exec_in_pod tool of the mcp-server-kubernetes MCP Server. The tool accepts user-provided commands in both array and string formats. When a string format is provided, it is passed directly to shell interpretation (sh -c) without input validation, allowing shell metacharacters to be interpreted. This vulnerability can be exploited through direct command injection or indirect prompt injection attacks, where AI agents may execute commands without explicit user intent. This vulnerability is fixed in 2.9.8.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/Flux159/mcp-server-kubernetes/commit/d091107ff92d9ffad1b3c295092f142d6578c48bGitHubgithub.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wgGitHubgithub.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wg

How CyberStrike helps

Frequently asked questions

What is CVE-2025-66404?

CVE-2025-66404 is a medium-severity vulnerability. It was published on December 3, 2025 and has a CVSS 3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2025-66404?

This vulnerability has a CVSS 3.1 base score of 6.4, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-66404?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-66404?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-66404 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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