CVE-2021-3830 : What You Need to Know

A detailed overview of the Cross-site Scripting (XSS) vulnerability found in btcpayserver/btcpayserver with technical details, impact, and mitigation steps.

Understanding CVE-2021-3830

This section provides insights into the CVE-2021-3830 vulnerability affecting btcpayserver/btcpayserver.

What is CVE-2021-3830?

CVE-2021-3830 highlights a vulnerability in btcpayserver/btcpayserver related to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). This flaw can be exploited for malicious purposes.

The Impact of CVE-2021-3830

The vulnerability's impact is rated as LOW with a CVSS base score of 3.8. It requires high privileges to exploit and has low confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-3830

Delve into the technical aspects of CVE-2021-3830 to understand the vulnerability better.

Vulnerability Description

The vulnerability stems from improper neutralization of input during web page generation, leading to Cross-site Scripting (XSS) attacks.

Affected Systems and Versions

The btcpayserver/btcpayserver version less than 1.2.3 is susceptible to this XSS vulnerability.

Exploitation Mechanism

The vulnerability can be exploited via a network attack vector with low attack complexity, requiring high privileges but no user interaction.

Mitigation and Prevention

Learn how to mitigate and prevent the exploitation of CVE-2021-3830 in btcpayserver/btcpayserver.

Immediate Steps to Take

Users are advised to update to version 1.2.3 or higher to mitigate the XSS vulnerability. Additionally, input validation and output encoding can help prevent XSS attacks.

Long-Term Security Practices

Employ secure coding practices, perform regular security audits, and educate developers on secure coding techniques to enhance overall application security.

Patching and Updates

Stay informed about security updates from btcpayserver and promptly apply patches to address known vulnerabilities.