# NATS Monitoring API Exposure Detection Module

id: nats-api-exposure
info:
  name: NATS Monitoring API Exposure
  author: sif
  severity: medium
  description: Detects an exposed NATS monitoring endpoint that leaks the server topology
  tags: [nats, messaging, api, exposure, recon]

type: http

http:
  method: GET
  paths:
    - "{{BaseURL}}/varz"

  matchers:
    - type: status
      status:
        - 200

    - type: word
      part: body
      words:
        - "\"server_id\""

    - type: word
      part: body
      words:
        - "\"max_payload\""

  extractors:
    - type: regex
      name: nats_version
      part: body
      regex:
        - '"version"\s*:\s*"([^"]+)"'
      group: 1