CVE-2023-43495 : What You Need to Know

A stored cross-site scripting (XSS) vulnerability in Jenkins versions 2.423 and earlier, LTS 2.414.1 and earlier has been identified. Attackers who can control the 'caption' constructor parameter of 'ExpandableDetailsNote' may exploit this issue.

Understanding CVE-2023-43495

This section provides an overview of the vulnerability, its impact, technical details, and mitigation steps.

What is CVE-2023-43495?

CVE-2023-43495 involves a stored cross-site scripting vulnerability in Jenkins where versions 2.423 and earlier, LTS 2.414.1 and earlier are affected. The issue arises due to improper escaping of the 'caption' constructor parameter of 'ExpandableDetailsNote'.

The Impact of CVE-2023-43495

The vulnerability allows attackers to execute malicious scripts in the context of an authenticated Jenkins user, potentially leading to various security risks such as data theft, privilege escalation, and further exploitation of the system.

Technical Details of CVE-2023-43495

In this section, we delve into the specifics of the vulnerability, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from the improper handling of the 'caption' constructor parameter of 'ExpandableDetailsNote' in Jenkins, allowing attackers to inject and execute malicious scripts.

Affected Systems and Versions

Jenkins versions 2.423 and earlier, as well as LTS 2.414.1 and earlier, are vulnerable to this XSS issue.

Exploitation Mechanism

Attackers with the ability to control the 'caption' constructor parameter of 'ExpandableDetailsNote' can exploit this vulnerability to insert malicious scripts that will then be executed by Jenkins.

Mitigation and Prevention

This section outlines the immediate steps to take, long-term security practices, and the importance of applying patches and updates.

Immediate Steps to Take

Users are advised to update Jenkins to versions that include the fix for this XSS vulnerability. Additionally, it is crucial to review and restrict access to sensitive areas, sanitize user inputs, and educate users on potential security risks.

Long-Term Security Practices

Implementing secure coding practices, conducting regular security audits, and staying informed about security advisories are essential for maintaining a secure Jenkins environment.

Patching and Updates

Regularly monitor for security updates released by Jenkins Project, apply patches promptly, and follow best practices to ensure the ongoing security of your Jenkins deployment.