CVE-2021-24353 : Security Advisory and Response

A security vulnerability, known as CVE-2021-24353, has been identified in the Simple 301 Redirects by BetterLinks WordPress plugin versions 2.0.0 through 2.0.3. This vulnerability allows unauthenticated users to import a set of site redirects due to missing authorization checks in the plugin.

Understanding CVE-2021-24353

This section will cover the details of the CVE-2021-24353 vulnerability in the Simple 301 Redirects by BetterLinks plugin.

What is CVE-2021-24353?

The import_data function of the Simple 301 Redirects by BetterLinks WordPress plugin before version 2.0.4 lacked capability or nonce checks, enabling unauthenticated users to import a set of site redirects.

The Impact of CVE-2021-24353

The vulnerability allows unauthorized users to manipulate site redirect data, potentially leading to unauthorized access and redirecting users to malicious sites.

Technical Details of CVE-2021-24353

In this section, we will delve into the technical aspects of the CVE-2021-24353 vulnerability.

Vulnerability Description

The import_data function in the affected plugin versions does not include proper capability or nonce checks, making it susceptible to unauthorized importing of site redirects.

Affected Systems and Versions

The vulnerability affects versions of the Simple 301 Redirects by BetterLinks plugin ranging from 2.0.0 to 2.0.3.

Exploitation Mechanism

Due to the lack of authorization checks, unauthenticated users can exploit the import_data function to manipulate site redirect information.

Mitigation and Prevention

This section will outline steps to mitigate and prevent the CVE-2021-24353 vulnerability.

Immediate Steps to Take

Users are advised to update the Simple 301 Redirects by BetterLinks plugin to version 2.0.4 or newer to prevent unauthorized redirect imports.

Long-Term Security Practices

Implement strict access controls, including user authentication and authorization mechanisms, to enhance the security of WordPress plugins.

Patching and Updates

Regularly monitor for plugin updates and security patches to address vulnerabilities and ensure the safety of WordPress installations.