CVE-2021-3920 : What You Need to Know

A detailed analysis of CVE-2021-3920, a vulnerability in grav-plugin-admin that allows Cross-site Scripting attacks.

Understanding CVE-2021-3920

This section provides insights into the impact, technical details, and mitigation strategies for CVE-2021-3920.

What is CVE-2021-3920?

The grav-plugin-admin is susceptible to Improper Neutralization of Input During Web Page Generation, leading to Cross-site Scripting (XSS) attacks.

The Impact of CVE-2021-3920

The vulnerability has a CVSS base score of 4.6 (Medium severity), with low impacts on confidentiality, integrity, and availability. Attackers can exploit it with low privileges and user interaction.

Technical Details of CVE-2021-3920

In this section, we delve into the vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

The flaw in grav-plugin-admin allows attackers to execute XSS attacks by injecting malicious scripts into web pages.

Affected Systems and Versions

The vulnerability affects all versions of getgrav/grav-plugin-admin less than 1.10.25.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting crafted scripts, tricking users into executing unintended actions.

Mitigation and Prevention

Here we discuss immediate steps, best security practices, and the importance of prompt patching and updates.

Immediate Steps to Take

Users should update grav-plugin-admin to version 1.10.25 or higher and educate users about XSS risks.

Long-Term Security Practices

Implement input validation, output encoding, and security headers to prevent XSS attacks and enhance web application security.

Patching and Updates

Regularly monitor for security patches and updates from the vendor to address vulnerabilities like CVE-2021-3920.