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CVE-2025-53355: Command Injection Vulnerability in MCP Server Kubernetes

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Overview

The vulnerability CVE-2025-53355 pertains to MCP Server Kubernetes, a server that connects to and manages a Kubernetes cluster. This vulnerability is particularly significant due to its potential to allow an attacker to inject arbitrary system commands, leading to remote code execution under the server process’s privileges.

Vulnerability Summary

CVE ID: CVE-2025-53355
Severity: High – 7.5 (CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

MCP Server Kubernetes | Versions prior to 2.5.0

How the Exploit Works

The vulnerability is caused by unsanitized input parameters within a call to child_process.execSync in the MCP Server Kubernetes. This exploit takes advantage of the server’s lack of proper input sanitization to inject arbitrary system commands.

Conceptual Example Code

A conceptual example of how the vulnerability might be exploited is as follows:

$ curl -X POST -H "Content-Type: application/json" -d '{"command": "; arbitrary_system_command ;"}' http://target.example.com/vulnerable/endpoint

In this example, the attacker sends a POST request to the vulnerable endpoint with a JSON payload containing an arbitrary system command. The command is injected into the system via the unsanitized `command` field, which is processed by `child_process.execSync`, leading to the execution of the injected command.

Mitigation

The recommended mitigation method is to apply the vendor patch, namely, the upgrade to version 2.5.0 which contains a fix for the vulnerability. As a temporary mitigation, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help to filter out malicious payloads.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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