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CVE-2025-53107: Command Injection Vulnerability in @cyanheads/git-mcp-server Potentially Leading to Remote Code Execution

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Overview

This report details a critical vulnerability (CVE-2025-53107) in @cyanheads/git-mcp-server, an MCP server designed to interact with Git repositories. The vulnerability poses a significant risk to any organization using versions of the server prior to 2.1.5. If exploited, this vulnerability could lead to a total system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-53107
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: Total system compromise or data leakage

Affected Products

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Product | Affected Versions

@cyanheads/git-mcp-server | Prior to 2.1.5

How the Exploit Works

The vulnerability stems from an insecure use of input parameters within a call to child_process.exec in @cyanheads/git-mcp-server. The server constructs and executes shell commands using unvalidated user input directly within command-line strings. This allows for the injection of shell metacharacters (|, >, &&, etc.), enabling an attacker to inject arbitrary system commands. If successfully exploited, this vulnerability can lead to remote code execution under the server process’s privileges, which in turn can lead to a full system compromise or data leakage.

Conceptual Example Code

Below is a
conceptual
example of how the vulnerability might be exploited. Please note that this is illustrative and does not represent an actual exploit.

# Connect to the server
$ mcp-client connect target.example.com
# Inject malicious command
$ mcp-client exec "git log; rm -rf /*"

In this example, an attacker connects to the target server using a vulnerable MCP client and then executes a command that first performs a harmless action (reading git logs) followed by a destructive action (deleting all files on the system).

Mitigation Guidance

Users of @cyanheads/git-mcp-server should immediately upgrade to version 2.1.5 or later, which contains a patch for this vulnerability. If upgrading is not immediately possible, temporary mitigation can be achieved by using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to block or detect malicious commands.

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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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