CVE-2023-49273 : Security Advisory and Response

Umbraco CMS is vulnerable to Privilege Escalation using Spoofing. This article provides an overview of CVE-2023-49273, including its impact, technical details, and mitigation steps.

Understanding CVE-2023-49273

Umbraco CMS is a content management system that is affected by a Privilege Escalation vulnerability due to Incorrect Authorization.

What is CVE-2023-49273?

CVE-2023-49273 allows users with low privileges to access unintended endpoints in Umbraco CMS versions 8.0.0 to 12.3.4, leading to Privilege Escalation using Spoofing.

The Impact of CVE-2023-49273

This vulnerability could be exploited by malicious actors to elevate their privileges within the CMS, potentially leading to unauthorized access to sensitive information.

Technical Details of CVE-2023-49273

The following technical details outline the vulnerability in Umbraco CMS:

Vulnerability Description

Users with low privileges (e.g., Editor role) can access unintended endpoints in Umbraco CMS versions 8.0.0 to 12.3.4, allowing for Privilege Escalation using Spoofing.

Affected Systems and Versions

Umbraco-CMS versions >= 8.0.0, < 8.18.10
Umbraco-CMS versions >= 9.0.0-rc001, < 10.8.1
Umbraco-CMS versions >= 11.0.0-rc1, < 12.3.4

Exploitation Mechanism

The vulnerability leverages Incorrect Authorization in Umbraco CMS to enable users with low privileges to access restricted endpoints.

Mitigation and Prevention

To protect systems from CVE-2023-49273, follow these mitigation strategies:

Immediate Steps to Take

Update Umbraco CMS to versions 8.18.10, 10.8.1, or 12.3.4 to apply the patch.
Monitor user privileges and restrict access to sensitive endpoints.

Long-Term Security Practices

Regularly update and patch CMS software to address known vulnerabilities.
Conduct security training for users to prevent unauthorized access.

Patching and Updates

Stay informed about security advisories from Umbraco and apply patches promptly to secure your systems.