CVE-2021-36746 Explained : Impact and Mitigation

Blackboard Learn through 9.1 is vulnerable to a Cross-Site Scripting (XSS) attack that allows an authenticated user to execute malicious scripts via the Assignment Instructions HTML editor.

Understanding CVE-2021-36746

This section delves into the details surrounding the CVE-2021-36746 vulnerability.

What is CVE-2021-36746?

CVE-2021-36746 pertains to a security flaw in Blackboard Learn through 9.1 that enables an authenticated user to carry out a Cross-Site Scripting (XSS) attack utilizing the Assignment Instructions HTML editor.

The Impact of CVE-2021-36746

This vulnerability could potentially be exploited by an attacker to inject and execute malicious scripts within the context of the user's session, leading to unauthorized actions or data theft.

Technical Details of CVE-2021-36746

In this section, we explore the technical aspects of CVE-2021-36746.

Vulnerability Description

The vulnerability in Blackboard Learn through 9.1 allows for XSS attacks, posing a risk of script injection by authenticated users via the Assignment Instructions HTML editor.

Affected Systems and Versions

All versions of Blackboard Learn through 9.1 are affected by this vulnerability, allowing potential exploitation by authenticated users.

Exploitation Mechanism

The exploit occurs when an authenticated user inserts malicious scripts through the Assignment Instructions HTML editor, which are then executed within the user's session.

Mitigation and Prevention

This section provides guidelines on mitigating the risks associated with CVE-2021-36746.

Immediate Steps to Take

To address this vulnerability, users are advised to implement restrictions on HTML input and validate user-submitted content to prevent script injection.

Long-Term Security Practices

Maintaining regular security audits, educating users on safe coding practices, and staying informed about updates and patches are crucial for ensuring ongoing protection against XSS vulnerabilities.

Patching and Updates

Users should promptly apply any security patches or updates released by Blackboard Learn to mitigate the risk of XSS attacks through the Assignment Instructions HTML editor.