CVE-2020-1450 : What You Need to Know

Microsoft SharePoint Server XSS Vulnerability

Understanding CVE-2020-1450

A cross-site-scripting (XSS) vulnerability in Microsoft SharePoint Server can lead to security risks.

What is CVE-2020-1450?

This vulnerability arises when SharePoint Server fails to sanitize specific web requests, allowing for XSS attacks. The CVE ID is distinct from CVE-2020-1451 and CVE-2020-1456.

The Impact of CVE-2020-1450

Malicious actors can execute arbitrary scripts in the context of the user's session.
Sensitive information may be accessed or modified without authorization.

Technical Details of CVE-2020-1450

SharePoint Server XSS Vulnerability Overview

Vulnerability Description

The XSS vulnerability in SharePoint Server stems from inadequate sanitization of certain web requests, enabling attackers to inject scripts.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Microsoft SharePoint Server 2019
Microsoft SharePoint Server 2010 Service Pack 2

Exploitation Mechanism

By sending crafted web requests, attackers can embed malicious scripts that run in the victim's session.
The scripts can then access sensitive data or perform unauthorized actions.

Mitigation and Prevention

Protecting Against CVE-2020-1450

Immediate Steps to Take

Apply Microsoft's recommended security updates promptly.
Implement input validation and output encoding to mitigate XSS risks.
Educate users about safe browsing habits and suspicious links.

Long-Term Security Practices

Regularly monitor and audit SharePoint Server for unusual activities.
Consider implementing a web application firewall for additional protection.
Conduct security training for developers on secure coding practices.

Patching and Updates

Stay informed about security advisories from Microsoft.
Keep SharePoint Server up to date with the latest patches and fixes.