CVE-2021-21265 : What You Need to Know

A detailed overview of CVE-2021-21265, highlighting the impact, technical details, mitigation steps, and more.

Understanding CVE-2021-21265

In this section, we will explore the specifics of the CVE-2021-21265 vulnerability affecting October CMS.

What is CVE-2021-21265?

CVE-2021-21265 involves a potential Host Header Poisoning vulnerability in October CMS versions prior to 1.1.2, leaving servers susceptible to attacks when misconfigured.

The Impact of CVE-2021-21265

With a CVSS base score of 6.8, this vulnerability poses a medium risk, allowing for Host Header Poisoning attacks with a significant integrity impact.

Technical Details of CVE-2021-21265

Delve into the technical aspects of the CVE-2021-21265 vulnerability to understand its implications.

Vulnerability Description

The vulnerability arises from poorly configured servers that route any request, irrespective of the HOST header, to an October CMS instance, enabling Host Header Poisoning attacks.

Affected Systems and Versions

October CMS versions prior to 1.1.2 are impacted by this vulnerability, making them susceptible to exploitation if not promptly addressed.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending requests to misconfigured servers, leveraging Host Header Poisoning to compromise system integrity.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-21265 and prevent potential exploitation.

Immediate Steps to Take

To mitigate the risk, users are advised to update October CMS to version 1.1.2 and configure trusted hosts within the application settings.

Long-Term Security Practices

Implement robust server configurations and follow security best practices to reduce the likelihood of Host Header Poisoning attacks in the future.

Patching and Updates

Regularly monitor for security updates and apply patches promptly to protect systems from known vulnerabilities.