CVE-2017-11820 : What You Need to Know

Microsoft SharePoint Enterprise Server 2013 SP1 and Microsoft SharePoint Enterprise Server 2016 are affected by a cross-site scripting (XSS) vulnerability, allowing attackers to exploit the system. Learn more about the impact, technical details, and mitigation steps.

Understanding CVE-2017-11820

This CVE involves a weakness in Microsoft SharePoint Enterprise Server versions 2013 SP1 and 2016, enabling attackers to abuse a cross-site scripting vulnerability.

What is CVE-2017-11820?

The vulnerability allows attackers to manipulate requests to a targeted SharePoint server, exploiting XSS.
Identified as "Microsoft Office SharePoint XSS Vulnerability".

The Impact of CVE-2017-11820

Attackers can execute cross-site scripting attacks on affected SharePoint servers.
The vulnerability arises from how SharePoint Server handles and filters web requests.

Technical Details of CVE-2017-11820

This section provides insights into the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

Attackers can abuse a cross-site scripting vulnerability in Microsoft SharePoint Enterprise Server 2013 SP1 and 2016.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2013 SP1
Microsoft SharePoint Enterprise Server 2016

Exploitation Mechanism

Attackers send manipulated requests to exploit the XSS vulnerability in SharePoint servers.

Mitigation and Prevention

Protect your systems from CVE-2017-11820 by following these mitigation strategies.

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Monitor and restrict network traffic to SharePoint servers.
Educate users on identifying and avoiding suspicious links or emails.

Long-Term Security Practices

Regularly update and patch SharePoint servers to address security vulnerabilities.
Implement web application firewalls to filter and block malicious traffic.
Conduct regular security assessments and penetration testing.

Patching and Updates

Stay informed about security advisories and updates from Microsoft.
Implement a robust patch management process to ensure timely deployment of fixes.