id: CVE-2021-21389

info:
  name: BuddyPress REST API Privilege Escalation to RCE
  author: lotusdll
  severity: high
  description: The BuddyPress WordPress plugin was affected by an REST API Privilege Escalation to RCE
  reference:
    - https://github.com/HoangKien1020/CVE-2021-21389
    - https://buddypress.org/2021/03/buddypress-7-2-1-security-release/
    - https://codex.buddypress.org/releases/version-7-2-1/
    - https://github.com/buddypress/BuddyPress/security/advisories/GHSA-m6j4-8r7p-wpp3
  tags: cve,cve2021,wordpress,wp-plugin,rce
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.80
    cve-id: CVE-2021-21389
    cwe-id: CWE-863


requests:
  - raw:
      - |
        POST /wp-json/buddypress/v1/signup HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json; charset=UTF-8

        {
          "user_login":"{{randstr}}",
          "password":"{{randstr}}",
          "user_name":"{{randstr}}",
          "user_email":"{{randstr}}@example.com"
        }

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - "application/json"
        part: header

      - type: word
        words:
          - "user_login"
          - "registered"
          - "activation_key"
          - "user_email"
        part: body
        condition: and