CVE-2021-21680 : What You Need to Know

Jenkins Nested View Plugin version 1.20 and earlier are vulnerable to XML external entity (XXE) attacks due to a misconfiguration in the XML transformer.

Understanding CVE-2021-21680

This CVE affects Jenkins Nested View Plugin versions 1.20 and earlier, leaving them open to potential security risks.

What is CVE-2021-21680?

CVE-2021-21680 is a vulnerability in the Jenkins Nested View Plugin that allows attackers to exploit XML external entity (XXE) attacks due to improper configuration of the XML transformer.

The Impact of CVE-2021-21680

The impact of this vulnerability is significant as it could lead to unauthorized access to sensitive data, information disclosure, and potential server compromise.

Technical Details of CVE-2021-21680

The technical details of CVE-2021-21680 include:

Vulnerability Description

Jenkins Nested View Plugin 1.20 and earlier fail to configure the XML transformer properly, making them susceptible to XML external entity (XXE) attacks.

Affected Systems and Versions

The affected systems include Jenkins Nested View Plugin versions up to 1.20, with version 1.19.1 being unaffected by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious XML code to trigger XXE attacks, potentially leading to various security breaches.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-21680, consider the following steps:

Immediate Steps to Take

Update Jenkins Nested View Plugin to version 1.19.1 or higher to avoid the vulnerability.

Long-Term Security Practices

Regularly monitor and apply security patches to all Jenkins plugins and extensions to prevent future vulnerabilities.

Patching and Updates

Stay informed about security advisories from Jenkins project and promptly apply recommended patches and updates to ensure system security.