CVE-2020-17021 Explained : Impact and Mitigation

Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability was published on November 10, 2020, with a CVSS base score of 5.4.

Understanding CVE-2020-17021

This CVE involves a Cross-site Scripting Vulnerability in Microsoft Dynamics 365 (on-premises).

What is CVE-2020-17021?

This CVE refers to a security issue in Microsoft Dynamics 365 (on-premises) that allows attackers to execute malicious scripts in a victim's browser.

The Impact of CVE-2020-17021

The vulnerability could lead to spoofing attacks, where attackers can impersonate users or entities to gain unauthorized access.

Technical Details of CVE-2020-17021

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability allows for cross-site scripting attacks in Microsoft Dynamics 365 (on-premises) version 9.0.

Affected Systems and Versions

Vendor: Microsoft
Product: Microsoft Dynamics 365 (on-premises) version 9.0
Platforms: Unknown
Affected Version: 9.0.0

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into web pages viewed by users of the affected Microsoft Dynamics 365 (on-premises) version.

Mitigation and Prevention

To address CVE-2020-17021, follow these mitigation steps:

Immediate Steps to Take

Apply the necessary security updates provided by Microsoft.
Educate users about the risks of clicking on suspicious links or visiting untrusted websites.

Long-Term Security Practices

Regularly monitor and audit web applications for vulnerabilities.
Implement Content Security Policy (CSP) to mitigate cross-site scripting attacks.

Patching and Updates

Stay informed about security updates released by Microsoft for Microsoft Dynamics 365 (on-premises) to patch the vulnerability.