CyberRota Analysis
AI-GeneratedThe mcp-shell server is vulnerable due to a default configuration that disables security features, allowing unrestricted execution of OS commands by any connected LLM when the security policy file is not set. This flaw can lead to significant security risks, including unauthorized command execution with the privileges of the mcp-shell process user. Organizations using versions prior to 0.6.0 should prioritize updating to the latest version to mitigate this high-severity vulnerability.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
Note: these links are listed for security research and verification purposes only.
Original NVD Description
mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, config.go initializes Security.Enabled to false, and when MCP_SHELL_SEC_CONFIG_FILE is unset, main.go starts the documented bare-binary deployment without a security policy. SecurityValidator.validateCommand in security.go then short-circuits and allows every command supplied to the shell_exec MCP tool, so an LLM connected over stdio can execute unrestricted OS commands as the mcp-shell process user. The README from-source installation and MCP client configuration omit MCP_SHELL_SEC_CONFIG_FILE, making the insecure state the documented default. This issue is fixed in version 0.6.0.