mcp-3d-printer-server

Security Findings (91)

• CriticalAS-006

  💻Arbitrary Code Execution

  heuristic signal

  blender_mcp_call:tool name or description implies arbitrary script/code execution (evaluate_script, execute javascript, etc.)

  Fix: This tool can execute arbitrary code or shell commands on the host system. Remove it unless strictly required. If kept: (1) restrict access to trusted users/agents only, (2) require human approval before each invocation (Claude Desktop: set approval_required: true; other clients: enable equivalent confirmation), (3) use the most restrictive sandbox or read-only mode available, and (4) never expose this tool to untrusted input sources.

• MediumAS-003

  🔀Scope Mismatch

  set_printer_temperature:tool name "set_printer_temperature" implies local write operation but only remote/network-class permissions were detected

  Fix: Ensure tool names, descriptions, and permission declarations are internally consistent. Use explicit naming conventions that fully reflect actual capabilities.

• LowAS-011

  ℹ️Missing Rate-Limit / Timeout ×8

  tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

  get_printer_statuslist_printer_filesupload_gcodestart_printcancel_printset_printer_temperatureprocess_and_print_stlprint_3mf

  Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.

• LowAS-002

  ⚠️Excessive Permissions ×7

  input schema exposes 12 properties (threshold: 10)

  upload_gcodemodify_stl_section

  input schema exposes 11 properties (threshold: 10)

  set_printer_temperature

  input schema exposes 31 properties (threshold: 10)

  slice_stlslice_with_template

  input schema exposes 17 properties (threshold: 10)

  process_and_print_stl

  input schema exposes 23 properties (threshold: 10)

  print_3mf

  Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

• InfoAS-002

  ⚠️Excessive Permissions ×30

  declared capabilities: network access

  get_printer_statuscancel_printset_printer_temperatureblender_mcp_status

  declared capabilities: network access, filesystem access

  list_printer_filesupload_gcodestart_printprocess_and_print_stlprint_3mf

  declared capabilities: filesystem access

  extend_stl_baseslice_stlslice_with_templatelist_templatessave_templateget_slice_settingsconfirm_temperaturesget_stl_infoscale_stlrotate_stltranslate_stlmodify_stl_sectiongenerate_stl_visualizationmerge_verticescenter_modellay_flatblender_mcp_export_stl

  declared capabilities: code/command execution, network access, filesystem access

  check_fulu_orca_setup

  declared capabilities: code/command execution, network access, filesystem access, HTTP requests

  fulu_bambu_network_rpc

  declared capabilities: code/command execution

  blender_mcp_call

  declared capabilities: code/command execution, filesystem access

  blender_mcp_edit_model

  Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.

• InfoAS-010

  🔑Insecure Secret Handling ×14

  input parameter "api_key" accepts a credential (informational; not evidence of insecure handling)

  get_printer_statuslist_printer_filesupload_gcodestart_printcancel_printset_printer_temperatureprocess_and_print_stl

  input parameter "bambu_token" accepts a credential (informational; not evidence of insecure handling)

  get_printer_statuslist_printer_filesupload_gcodestart_printcancel_printset_printer_temperatureprint_3mf

  Fix: Avoid accepting raw credentials as input parameters. Use secret managers (e.g. 1Password CLI, AWS Secrets Manager) and ensure credentials are never logged or stored in agent traces.

• InfoAS-014

  ℹ️Dependency Inventory Unavailable ×30

  No metadata.dependencies or repo_url were exposed by this MCP server, and no local project manifest could be inferred from the launch command.

  get_printer_statuslist_printer_filesupload_gcodestart_printcancel_printset_printer_temperatureextend_stl_baseslice_stlslice_with_templatelist_templatessave_templateget_slice_settingsconfirm_temperaturesprocess_and_print_stlget_stl_infoscale_stlrotate_stltranslate_stlmodify_stl_sectiongenerate_stl_visualizationprint_3mfcheck_fulu_orca_setupfulu_bambu_network_rpcmerge_verticescenter_modellay_flatblender_mcp_statusblender_mcp_callblender_mcp_export_stlblender_mcp_edit_model

  Fix: Review and remediate the identified issue.