CVE-2023-49278 : Security Advisory and Response

Umbraco CMS brute force exploit can be used to collect valid usernames.

Understanding CVE-2023-49278

This CVE describes a vulnerability in Umbraco CMS that allows a brute force exploit to collect valid usernames, affecting multiple versions of the CMS.

What is CVE-2023-49278?

Umbraco, an ASP.NET content management system, is vulnerable to a brute force exploit in versions 8.0.0 to 8.18.10, 9.0.0-rc001 to 10.8.1, and 11.0.0-rc1 to 12.3.4, allowing attackers to gather valid usernames.

The Impact of CVE-2023-49278

The exploit can lead to exposure of sensitive information to unauthorized actors and improper restriction of excessive authentication attempts, potentially compromising user data.

Technical Details of CVE-2023-49278

This section provides more in-depth technical details about the CVE.

Vulnerability Description

The vulnerability in Umbraco CMS allows attackers to perform brute force attacks to gather valid usernames, potentially leading to unauthorized access.

Affected Systems and Versions

Umbraco CMS versions 8.0.0 to 8.18.10, 9.0.0-rc001 to 10.8.1, and 11.0.0-rc1 to 12.3.4 are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by using automated tools to carry out brute force attacks on the login system of Umbraco CMS.

Mitigation and Prevention

To address CVE-2023-49278 and enhance security, follow these mitigation strategies.

Immediate Steps to Take

Update Umbraco CMS to the latest patched version (8.18.10, 10.8.1, or 12.3.4).
Implement strong password policies and account lockout mechanisms to prevent brute force attacks.

Long-Term Security Practices

Regularly monitor and audit login attempts for any suspicious activity.
Train users on secure password practices and the importance of multi-factor authentication.

Patching and Updates

Stay informed about security advisories and patches released by Umbraco CMS to address vulnerabilities and enhance system security.