CVE-2021-4341 Explained : Impact and Mitigation

A critical vulnerability has been identified in the uListing plugin for WordPress, allowing unauthenticated attackers to bypass authorization and modify WordPress database options.

Understanding CVE-2021-4341

This CVE-2021-4341 vulnerability affects the Directory Listings WordPress plugin - uListing, specifically versions up to and including 1.6.6.

What is CVE-2021-4341?

The uListing plugin for WordPress is susceptible to an authorization bypass via Ajax due to missing capability checks, input validation, and a security nonce in the stm_update_email_data AJAX action. This security flaw enables unauthorized users to alter any WordPress option stored in the database.

The Impact of CVE-2021-4341

With a CVSS base score of 9.8, this vulnerability is deemed critical. Attackers can exploit this flaw to escalate privileges, compromise data integrity, and execute malicious actions within the WordPress site.

Technical Details of CVE-2021-4341

This section provides more in-depth information about the vulnerability.

Vulnerability Description

The vulnerability in the uListing plugin for WordPress arises from lacking key security measures such as capability checks, input validation, and security nonces in the AJAX action, stm_update_email_data. These shortcomings enable attackers to manipulate WordPress database options without proper authentication.

Affected Systems and Versions

The vulnerability affects uListing plugin versions up to and including 1.6.6.

Exploitation Mechanism

Exploiting this vulnerability involves leveraging the missing security controls in the stm_update_email_data AJAX action to bypass authorization and make unauthorized modifications to the WordPress database.

Mitigation and Prevention

Protect your WordPress site from CVE-2021-4341 by following these security measures.

Immediate Steps to Take

Update the uListing plugin to version 1.7 or higher to patch the vulnerability.
Monitor your site for any unusual activity or unauthorized changes.

Long-Term Security Practices

Regularly update WordPress plugins and themes to mitigate security risks.
Implement strong authentication mechanisms and access controls to prevent unauthorized access.

Patching and Updates

Stay informed about security updates for the uListing plugin and apply patches promptly to safeguard your WordPress site.