CVE-2023-5416 Explained : Impact and Mitigation

This CVE-2023-5416 implicates the Funnelforms Free plugin for WordPress, exposing a vulnerability that allows authenticated attackers with subscriber-level permissions and above to delete categories due to missing capability checks on the fnsf_delete_category function in versions up to, and including, 3.4.

Understanding CVE-2023-5416

In this section, we will delve deeper into the nature of CVE-2023-5416 and its implications on the affected systems.

What is CVE-2023-5416?

The vulnerability in the Funnelforms Free plugin for WordPress arises from a lack of proper capability checks on the fnsf_delete_category function. This oversight enables authenticated attackers with specific permissions to delete categories within the plugin.

The Impact of CVE-2023-5416

With this vulnerability, attackers can manipulate data within the Funnelforms Free plugin, potentially disrupting the functionality of the affected WordPress websites. The ability to delete categories could lead to data loss and a compromised user experience.

Technical Details of CVE-2023-5416

Let's explore the technical aspects of CVE-2023-5416, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability allows authenticated attackers with subscriber-level permissions and higher to delete categories within the Funnelforms Free plugin for WordPress, impacting the integrity of data stored within the plugin.

Affected Systems and Versions

Funnelforms Free plugin versions up to and including 3.4 are vulnerable to CVE-2023-5416. Websites using these versions of the plugin are at risk of unauthorized category deletions by attackers with the specified permissions.

Exploitation Mechanism

Exploiting CVE-2023-5416 requires an authenticated attacker to have subscriber-level permissions or higher within the WordPress environment where the vulnerable Funnelforms Free plugin is installed. By leveraging the missing capability checks on the fnsf_delete_category function, attackers can delete categories.

Mitigation and Prevention

In this section, we will discuss the immediate steps to take, long-term security practices, and the importance of patching and updates in mitigating the risks associated with CVE-2023-5416.

Immediate Steps to Take

Update the Funnelforms Free plugin to the latest version to patch the vulnerability and prevent unauthorized category deletions.
Review and adjust user permissions within WordPress to limit the capabilities of potential attackers.
Monitor website activity closely for any unauthorized changes or deletions.

Long-Term Security Practices

Implement regular security audits and vulnerability assessments on your WordPress plugins and themes.
Educate users with elevated permissions on best practices for maintaining a secure environment.
Stay informed about security updates and advisories from plugin developers and security researchers.

Patching and Updates

Stay proactive in applying patches and updates released by the Funnelforms Free plugin developers to address security vulnerabilities like CVE-2023-5416. Regularly check for new plugin versions and prioritize their installation to enhance the security of your WordPress website.