CVE-2021-36403 : Security Advisory and Response

A security vulnerability has been identified in Moodle that could lead to a phishing risk due to hidden message links in email notifications.

Understanding CVE-2021-36403

This section will delve into the specifics of CVE-2021-36403.

What is CVE-2021-36403?

The vulnerability in Moodle allows for email notifications of messages to have the link back to the original message hidden by HTML, potentially exposing users to phishing attacks.

The Impact of CVE-2021-36403

The impact of this vulnerability includes an increased risk of users falling victim to phishing attempts via manipulated email notifications.

Technical Details of CVE-2021-36403

Explore the technical aspects of CVE-2021-36403 in this section.

Vulnerability Description

The vulnerability in Moodle affects the visibility of links in email notifications, creating a phishing risk for users.

Affected Systems and Versions

Moodle versions 3.11, 3.10 to 3.10.4, 3.9 to 3.9.7, and earlier unsupported versions are affected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending manipulated email notifications containing hidden message links to targeted users.

Mitigation and Prevention

Learn about the steps to mitigate and prevent the exploitation of CVE-2021-36403.

Immediate Steps to Take

Users are advised to be cautious while interacting with email notifications from Moodle and avoid clicking on suspicious links.

Long-Term Security Practices

Implementing security awareness training and regularly updating Moodle can help prevent such vulnerabilities from being exploited.

Patching and Updates

It is crucial to apply patches released by Moodle to address this vulnerability and ensure the security of the platform.