CVE-2019-20042 : Vulnerability Insights and Analysis

WordPress versions 3.7 to 5.3.0 are vulnerable to a stored cross-site scripting (XSS) issue in the wp_targeted_link_rel() function in wp-includes/formatting.php. WordPress 5.3.1 has been released to address this vulnerability.

Understanding CVE-2019-20042

This CVE identifies a security vulnerability in WordPress versions 3.7 to 5.3.0 that could lead to a stored XSS attack.

What is CVE-2019-20042?

In WordPress versions 3.7 to 5.3.0, the wp_targeted_link_rel() function in wp-includes/formatting.php can be manipulated to create a stored cross-site scripting (XSS) vulnerability.

The Impact of CVE-2019-20042

This vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2019-20042

WordPress versions 3.7 to 5.3.0 are affected by this vulnerability.

Vulnerability Description

The wp_targeted_link_rel() function in WordPress can be exploited to execute stored XSS attacks.

Affected Systems and Versions

Affected Versions: WordPress 3.7 to 5.3.0

Exploitation Mechanism

Attackers can exploit the wp_targeted_link_rel() function to inject malicious scripts into web pages, compromising user data and security.

Mitigation and Prevention

WordPress users should take immediate action to secure their websites.

Immediate Steps to Take

Update WordPress to version 5.3.1 or later to patch the vulnerability.
Regularly monitor for security advisories and apply updates promptly.

Long-Term Security Practices

Implement web application firewalls to filter and block malicious traffic.
Conduct regular security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Install security updates and patches provided by WordPress to ensure ongoing protection against known vulnerabilities.