CVE-2021-24319 : Exploit Details and Defense Strategies

A WordPress theme named Bello - Directory & Listing before version 1.6.0 was vulnerable to an Authenticated Cross-Site Scripting (XSS) and XFS issue.

Understanding CVE-2021-24319

This CVE involves a Cross-Site Scripting vulnerability in the Bello - Directory & Listing theme.

What is CVE-2021-24319?

The Bello theme versions prior to 1.6.0 did not adequately sanitize the post_excerpt parameter, resulting in a Cross-Site Scripting flaw.

The Impact of CVE-2021-24319

The vulnerability could allow an authenticated attacker to inject malicious scripts into the shop/my-account/bello-listing-endpoint/ page, potentially compromising user data or performing unauthorized actions.

Technical Details of CVE-2021-24319

The technical details of the CVE include:

Vulnerability Description

The issue stems from improper input sanitization of the post_excerpt parameter.

Affected Systems and Versions

The Bello theme versions less than 1.6.0 are impacted by this vulnerability.

Exploitation Mechanism

An authenticated attacker can exploit this vulnerability by injecting malicious scripts via the affected page.

Mitigation and Prevention

To address CVE-2021-24319, consider the following steps:

Immediate Steps to Take

Update the Bello - Directory & Listing theme to version 1.6.0 or newer.
Implement security best practices such as input validation and output sanitization.

Long-Term Security Practices

Regularly monitor and patch vulnerabilities in WordPress themes and plugins.
Educate users on identifying and reporting suspicious activities.

Patching and Updates

Stay informed about security patches and updates for the Bello - Directory & Listing theme to protect against potential exploits.