CVE-2021-24649 : Exploit Details and Defense Strategies

A security vulnerability, CVE-2021-24649, has been identified in the WP User Frontend WordPress plugin before version 3.5.29. This vulnerability could allow an attacker to create an account with any role they want, such as admin, by exploiting a flaw in the registration form.

Understanding CVE-2021-24649

This section will delve into the details of the CVE-2021-24649 vulnerability.

What is CVE-2021-24649?

The CVE-2021-24649 vulnerability exists in the WP User Frontend WordPress plugin before version 3.5.29. It is caused by improper authentication, where an attacker could manipulate a user-supplied argument to create an account with escalated privileges.

The Impact of CVE-2021-24649

The impact of this vulnerability is significant as it could lead to unauthorized users gaining administrative access to the WordPress site, potentially compromising sensitive data and performing malicious activities.

Technical Details of CVE-2021-24649

In this section, we will discuss the technical aspects of CVE-2021-24649.

Vulnerability Description

The WP User Frontend plugin before version 3.5.29 uses an argument called urhidden in the registration form, allowing attackers access to AUTH_KEY and AUTH_SALT constants to create accounts with unauthorized roles like admin.

Affected Systems and Versions

The affected system is the WP User Frontend plugin before version 3.5.29. Websites using this specific version are vulnerable to exploitation.

Exploitation Mechanism

Attackers with access to AUTH_KEY and AUTH_SALT constants can manipulate the urhidden argument to create admin accounts, exploiting the plugin's encryption method.

Mitigation and Prevention

To safeguard your website from CVE-2021-24649, follow the mitigation and prevention steps outlined below.

Immediate Steps to Take

Update the WP User Frontend plugin to version 3.5.29 or newer to eliminate the vulnerability.
Monitor account creation activities for any suspicious registrations.

Long-Term Security Practices

Regularly update all WordPress plugins and themes to their latest versions.
Implement strong access controls and authentication mechanisms to prevent unauthorized access.

Patching and Updates

Stay informed about security patches released by plugin developers and apply them promptly to secure your WordPress site.