id: caddy-open-redirect

info:
  name: Caddy 2.4.6 Open Redirect (php_fastcgi)
  author: dhiyaneshDK
  severity: medium
  reference:
    - https://github.com/caddyserver/caddy/issues/4502
  tags: redirect,caddy,server

requests:
  - method: GET
    path:
      - '{{BaseURL}}//example.com/%2F..'

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)?(?:[a-zA-Z0-9\-_\.@]*)example\.com\/?(\/|[^.].*)?$' # https://regex101.com/r/ZDYhFh/1