CVE-2025-66404

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.

CVSS v3.1 Score

6.4

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-77 CWE-77

Affected Products

Vendor	Product	Versions
suyogs	mcp-server-kubernetes	< 2.9.8

References

Advisories & Patches

https://github.com/Flux159/mcp-server-kubernetes/commit/d091107ff92d9ffad1b3c295092f142d6578c48b https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wg https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wg

Exploits

https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wg https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-wvxp-jp4w-w8wg

Frequently Asked Questions

What is CVE-2025-66404? +

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. It has a CVSS v3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2025-66404? +

CVE-2025-66404 has a CVSS v3.1 score of 6.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-66404? +

CVE-2025-66404 affects products from suyogs, specifically: mcp-server-kubernetes. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-66404? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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