CVE-2021-22950 : What You Need to Know

Concrete CMS prior to version 8.5.6 was found to have a CSRF vulnerability that allowed attachments to comments in the conversation section to be deleted. The vulnerability was discovered by the Solar Security Research Team.

Understanding CVE-2021-22950

This section will cover the details related to CVE-2021-22950, including its impact, technical aspects, and mitigation steps.

What is CVE-2021-22950?

CVE-2021-22950 is a Cross-Site Request Forgery (CSRF) vulnerability in Concrete CMS versions prior to 8.5.6. This vulnerability could allow attackers to delete attachments in the conversation section by exploiting the CSRF flaw.

The Impact of CVE-2021-22950

The CSRF vulnerability poses a risk of unauthorized deletion of attachments in the conversation section of Concrete CMS, potentially leading to data loss or manipulation. Attackers could misuse this vulnerability to disrupt communication within the system.

Technical Details of CVE-2021-22950

Let's delve into the specific technical aspects of CVE-2021-22950 to understand how the vulnerability manifests.

Vulnerability Description

The CSRF vulnerability in Concrete CMS versions prior to 8.5.6 enables attackers to craft malicious requests that lead to the deletion of attachments in the conversation section without proper authorization checks.

Affected Systems and Versions

Concrete CMS versions before 8.5.6 are known to be impacted by this CSRF vulnerability. Users are advised to upgrade to version 8.5.6 or later to mitigate the risk.

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking authenticated users into visiting a malicious website or clicking on a specially crafted link, leading to the unauthorized deletion of attachments.

Mitigation and Prevention

To safeguard systems from the risks associated with CVE-2021-22950, immediate steps should be taken, followed by adopting long-term security practices and ensuring timely patching and updates.

Immediate Steps to Take

Users of Concrete CMS are strongly advised to update their installations to version 8.5.6 or newer to eliminate the CSRF vulnerability and prevent unauthorized deletion of attachments.

Long-Term Security Practices

Implementing security best practices such as user awareness training, secure coding guidelines, and regular security audits can help fortify systems against CSRF attacks and other potential security threats.

Patching and Updates

Regularly monitoring for security patches and updates released by Concrete CMS, and promptly applying them to the system, is crucial in maintaining a secure environment and preventing exploitation of known vulnerabilities.