CVE-2020-8288 : Security Advisory and Response

Rocket.Chat server before 3.9.2 is vulnerable to a cross-site scripting (XSS) issue in the

specializedRendering

function.

Understanding CVE-2020-8288

This CVE involves a stored XSS vulnerability in Rocket.Chat server.

What is CVE-2020-8288?

The

specializedRendering

function in Rocket.Chat server before version 3.9.2 is susceptible to a cross-site scripting (XSS) vulnerability through the

value

parameter.

The Impact of CVE-2020-8288

Attackers can exploit this vulnerability to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions.

Technical Details of CVE-2020-8288

Rocket.Chat server's security flaw is detailed below:

Vulnerability Description

The issue allows for a stored XSS attack via the

value

parameter in the

specializedRendering

function.

Affected Systems and Versions

Product: Rocket.Chat server
Versions Affected: All versions before 3.9.2

Exploitation Mechanism

Attackers can inject malicious scripts through the

value

parameter, leading to XSS attacks.

Mitigation and Prevention

Protect your systems from CVE-2020-8288 with the following measures:

Immediate Steps to Take

Update Rocket.Chat server to version 3.9.2 or later to mitigate the vulnerability.
Educate users about the risks of executing scripts from untrusted sources.

Long-Term Security Practices

Regularly monitor and audit your web applications for security vulnerabilities.
Implement input validation and output encoding to prevent XSS attacks.
Stay informed about security updates and best practices to enhance your system's security.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.