CVE-2021-40868 : Security Advisory and Response

In Cloudron 6.2, the returnTo parameter on the login page is vulnerable to Reflected XSS.

Understanding CVE-2021-40868

In this CVE, a security vulnerability exists in Cloudron 6.2 related to a reflected Cross-Site Scripting (XSS) issue.

What is CVE-2021-40868?

CVE-2021-40868 highlights a vulnerability in Cloudron 6.2 where the returnTo parameter on the login page can be exploited through reflected XSS.

The Impact of CVE-2021-40868

This vulnerability could allow an attacker to execute malicious scripts in the context of a user's session, potentially leading to sensitive data theft or unauthorized actions.

Technical Details of CVE-2021-40868

The technical aspects of this CVE are as follows:

Vulnerability Description

The returnTo parameter on Cloudron 6.2's login page is susceptible to reflected XSS attacks.

Affected Systems and Versions

Product: Not Applicable
Vendor: Not Applicable
Version: Not Applicable

Exploitation Mechanism

The vulnerability can be exploited by crafting a malicious link containing script code that, when clicked by a user, executes in the user's session.

Mitigation and Prevention

To address CVE-2021-40868, consider the following steps:

Immediate Steps to Take

Regularly monitor and validate input data to prevent the execution of malicious scripts.
Implement input sanitization to filter out potentially harmful content.
Update to the latest version of Cloudron to patch the vulnerability.

Long-Term Security Practices

Conduct security training for developers to raise awareness of secure coding practices.
Perform regular security audits and penetration testing to identify and address vulnerabilities proactively.

Patching and Updates

Apply security patches provided by Cloudron promptly to address known vulnerabilities.