CVE-2021-24637 : Vulnerability Insights and Analysis

The Google Fonts Typography WordPress plugin before version 3.0.3 is susceptible to Stored Cross-Site Scripting attacks due to inadequate input sanitization on block settings.

Understanding CVE-2021-24637

This CVE identifies a security vulnerability in the Fonts Plugin | Google Fonts Typography WordPress plugin.

What is CVE-2021-24637?

The vulnerability in the Google Fonts Typography WordPress plugin before 3.0.3 enables users with as low as Contributor role to execute Stored Cross-Site Scripting attacks.

The Impact of CVE-2021-24637

Malicious users can exploit this vulnerability to inject and execute arbitrary scripts on targeted WordPress websites, potentially leading to unauthorized actions.

Technical Details of CVE-2021-24637

The following technical details provide insights into the vulnerability.

Vulnerability Description

The flaw in the plugin allows low-role users to conduct Stored Cross-Site Scripting attacks via various block settings.

Affected Systems and Versions

The affected version is prior to 3.0.3 of the Fonts Plugin | Google Fonts Typography WordPress plugin.

Exploitation Mechanism

Attackers combine blockType with content, align, color, variant, and fontID arguments of a Gutenberg block to carry out the Stored Cross-Site Scripting attacks.

Mitigation and Prevention

To safeguard your system from CVE-2021-24637, consider the following measures.

Immediate Steps to Take

Update the Fonts Plugin | Google Fonts Typography to version 3.0.3 or higher immediately.
Limit user access levels to minimize the risk of exploitation.

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments on WordPress plugins.
Educate users on safe practices to avoid falling prey to social engineering tactics.

Patching and Updates

Stay informed about security advisories and promptly install updates and patches released by plugin vendors.