CVE-2021-33926 Explained : Impact and Mitigation

A vulnerability in Plone CMS versions allows an attacker to access sensitive information via the RSS feed protlet.

Understanding CVE-2021-33926

This section will cover what CVE-2021-33926 is, its impact, technical details, mitigation, and prevention.

What is CVE-2021-33926?

The CVE-2021-33926 vulnerability exists in Plone CMS versions 4.3.3 to 5.2.4, allowing unauthorized access to sensitive data through the RSS feed protlet.

The Impact of CVE-2021-33926

The vulnerability poses a risk of exposing confidential information to unauthorized parties, potentially leading to data breaches and privacy violations.

Technical Details of CVE-2021-33926

Below are specific technical details regarding the CVE-2021-33926 vulnerability:

Vulnerability Description

The flaw in Plone CMS versions allows attackers to leverage the RSS feed protlet to access internal URLs and retrieve sensitive data.

Affected Systems and Versions

Plone CMS versions 4.3.3 to 5.2.4 are affected by this vulnerability, potentially impacting a wide range of installations.

Exploitation Mechanism

Attackers can exploit this vulnerability by using the feedparser to access internal URLs and extract confidential information.

Mitigation and Prevention

To address the CVE-2021-33926 vulnerability, consider taking the following steps for immediate and long-term security:

Immediate Steps to Take

Apply the security hotfix provided by Plone CMS to address the vulnerability.
Monitor RSS feed activity and check for any unauthorized access.

Long-Term Security Practices

Regularly update Plone CMS to the latest version to ensure patches for known vulnerabilities.
Conduct security audits to identify and address any existing exploitation risks.

Patching and Updates

Stay informed on security advisories from Plone CMS and promptly apply patches and updates to protect against potential threats.