CVE-2019-5727 : Vulnerability Insights and Analysis

Persistent XSS, also known as SPL-138827, is a vulnerability found in Splunk Web within various versions of Splunk Enterprise and Splunk Light.

Understanding CVE-2019-5727

What is CVE-2019-5727?

Persistent XSS vulnerability in Splunk Web in multiple versions of Splunk Enterprise and Splunk Light.

The Impact of CVE-2019-5727

This vulnerability could allow an attacker to execute malicious scripts in the context of a user's session, potentially leading to unauthorized actions.

Technical Details of CVE-2019-5727

Vulnerability Description

Splunk Web in Splunk Enterprise and Splunk Light versions before specified releases is susceptible to Persistent XSS.

Affected Systems and Versions

Splunk Enterprise: 6.5.x before 6.5.5, 6.4.x before 6.4.9, 6.3.x before 6.3.12, 6.2.x before 6.2.14, 6.1.x before 6.1.14, 6.0.x before 6.0.15
Splunk Light: before version 6.6.0

Exploitation Mechanism

The vulnerability can be exploited by injecting malicious scripts into input fields or parameters, which are then executed when a user interacts with the affected application.

Mitigation and Prevention

Immediate Steps to Take

Update Splunk Enterprise and Splunk Light to the recommended versions that address this vulnerability.
Implement input validation mechanisms to sanitize user inputs and prevent script injection.

Long-Term Security Practices

Regularly monitor and audit web application security controls.
Educate users on safe browsing practices and the risks of executing untrusted scripts.

Patching and Updates

Apply security patches and updates provided by Splunk to fix the Persistent XSS vulnerability.