CVE-2020-10146 Explained : Impact and Mitigation

Microsoft Teams online service had a stored cross-site scripting vulnerability in the displayName parameter, allowing attackers to access sensitive data and potentially execute arbitrary commands.

Understanding CVE-2020-10146

This CVE involves a stored cross-site scripting vulnerability in Microsoft Teams that was fixed around October 2020.

What is CVE-2020-10146?

The vulnerability in the displayName parameter of Microsoft Teams online service could be exploited to retrieve authentication tokens and execute unauthorized commands.

The Impact of CVE-2020-10146

CVSS Base Score: 5.7 (Medium Severity)
Confidentiality Impact: High
Attack Vector: Network
User Interaction: Required

Technical Details of CVE-2020-10146

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability allowed attackers to perform stored cross-site scripting attacks on Teams clients, potentially leading to the execution of arbitrary commands.

Affected Systems and Versions

Product: Microsoft Teams
Vendor: Microsoft
Affected Versions:
Version: Unspecified
Before or around October 2020

Exploitation Mechanism

The vulnerability could be exploited by injecting malicious scripts into the displayName parameter of Microsoft Teams.

Mitigation and Prevention

To address and prevent this vulnerability, follow these steps:

Immediate Steps to Take

Ensure all Microsoft Teams users have received the fix implemented around October 2020.
Educate users about the risks of executing scripts from untrusted sources.

Long-Term Security Practices

Regularly update Microsoft Teams to the latest version to prevent known vulnerabilities.
Implement security training for users to recognize and report suspicious activities.
Monitor and analyze network traffic for any unusual behavior.

Patching and Updates

Regularly check for and apply updates provided by Microsoft to ensure the latest security patches are in place.