CVE-2023-41895 : What You Need to Know

A critical Cross-site Scripting vulnerability has been identified in Home Assistant Core, impacting versions prior to 2023.9.0. Users are highly recommended to upgrade to the latest version to mitigate this risk.

Understanding CVE-2023-41895

This CVE highlights an issue where the Home Assistant login page allows for arbitrary JavaScript execution, posing a significant risk to user accounts and installations.

What is CVE-2023-41895?

The vulnerability in Home Assistant Core enables malicious actors to execute Cross-site Scripting attacks by leveraging the

redirect_uri

and

client_id

parameters, leading to potential account takeover.

The Impact of CVE-2023-41895

Exploitation of this vulnerability can result in full control over Home Assistant accounts and installations, compromising user data and system integrity.

Technical Details of CVE-2023-41895

The vulnerability allows for unauthorized JavaScript execution on the Home Assistant administration page through the

javascript:

scheme URIs.

Vulnerability Description

By bypassing standard scheme validation, attackers can inject and execute arbitrary scripts on the Home Assistant frontend, posing a severe security threat.

Affected Systems and Versions

All Home Assistant Core versions before 2023.9.0 are vulnerable to this exploit, requiring immediate attention to prevent unauthorized access.

Exploitation Mechanism

Malicious entities can leverage the

redirect_uri

parameter to execute JavaScript code, potentially leading to a complete compromise of the Home Assistant account.

Mitigation and Prevention

It is crucial for users to upgrade to version 2023.9.0 immediately to safeguard against this critical vulnerability.

Immediate Steps to Take

Users should update their Home Assistant Core installations to version 2023.9.0 to address the Cross-site Scripting vulnerability and enhance overall security.

Long-Term Security Practices

Regularly updating software and implementing secure coding practices can help prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed about security patches and updates released by Home Assistant to protect against evolving threats.