CVE-2020-8191 Explained : Impact and Mitigation

Citrix ADC, Citrix Gateway, and Citrix SDWAN WAN-OP are affected by an improper input validation vulnerability that allows reflected Cross Site Scripting (XSS).

Understanding CVE-2020-8191

This CVE identifies a security issue in Citrix products that could lead to XSS attacks.

What is CVE-2020-8191?

CVE-2020-8191 is an improper input validation vulnerability in Citrix ADC, Citrix Gateway, and Citrix SDWAN WAN-OP versions before specific releases, allowing for reflected XSS attacks.

The Impact of CVE-2020-8191

The vulnerability could be exploited by attackers to execute malicious scripts in the context of a user's browser, potentially leading to unauthorized actions or data theft.

Technical Details of CVE-2020-8191

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from improper input validation in the affected Citrix products, enabling attackers to inject and execute malicious scripts.

Affected Systems and Versions

Products: Citrix ADC, Citrix Gateway, Citrix SDWAN WAN-OP
Vulnerable Versions: Citrix ADC and Citrix Gateway 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14, 10.5-70.18, and Citrix SDWAN WAN-OP 11.1.1a, 11.0.3d, 10.2.7

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious URLs that, when clicked by users, execute unauthorized scripts in their browsers.

Mitigation and Prevention

Protecting systems from CVE-2020-8191 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches provided by Citrix to fix the vulnerability.
Monitor and filter input data to prevent XSS attacks.

Long-Term Security Practices

Regularly update and patch Citrix products to address security flaws.
Educate users on safe browsing practices to minimize the risk of XSS attacks.

Patching and Updates

Ensure that all Citrix ADC, Citrix Gateway, and Citrix SDWAN WAN-OP instances are updated to versions that address the XSS vulnerability.