CVE-2021-24545 : What You Need to Know

WordPress plugin WP HTML Author Bio version 1.2.0 and below is vulnerable to stored Cross-Site Scripting, allowing users to execute malicious JavaScript. This could lead to privilege escalation and Cross-Site Scripting attacks.

Understanding CVE-2021-24545

This CVE relates to a security issue in the WP HTML Author Bio plugin, allowing users to inject malicious scripts into user bios, leading to potential attacks.

What is CVE-2021-24545?

The WP HTML Author Bio WordPress plugin version 1.2.0 and below are prone to Cross-Site Scripting (XSS) attacks due to inadequate sanitization of user bios, enabling malicious code execution.

The Impact of CVE-2021-24545

Users with roles as low as authors can conduct Cross-Site Scripting attacks, potentially escalating privileges when an administrator views related posts.

Technical Details of CVE-2021-24545

This section outlines the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in WP HTML Author Bio <= 1.2.0 stems from insufficient sanitization of user bios, permitting the execution of malicious JavaScript.

Affected Systems and Versions

The issue affects WP HTML Author Bio plugin version 1.2.0 and below.

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting malicious JavaScript code into their user bio, which triggers when a post authored by them is visited on the frontend.

Mitigation and Prevention

Protect your system by taking immediate steps and following long-term security practices.

Immediate Steps to Take

Ensure to update the WP HTML Author Bio plugin to the latest version to mitigate the risk of Cross-Site Scripting attacks.

Long-Term Security Practices

Regularly monitor for plugin updates, educate users on secure coding practices, and conduct security audits to address vulnerabilities promptly.

Patching and Updates

Stay informed about security patches and updates released by plugin vendors, applying them promptly to secure your WordPress environment.