CVE-2017-16860 : What You Need to Know

A cross-site scripting (XSS) vulnerability in Atlassian Application Links allows remote attackers to inject arbitrary HTML or JavaScript.

Understanding CVE-2017-16860

Atlassian Application Links versions prior to 5.2.7, between 5.3.0 and 5.3.4, and between 5.4.0 and 5.4.3 are affected by a cross-site scripting vulnerability.

What is CVE-2017-16860?

This CVE identifies a cross-site scripting (XSS) vulnerability in the redirect warning message of the invalidRedirectUrl template within Atlassian Application Links.

The Impact of CVE-2017-16860

Exploiting this vulnerability allows remote attackers to inject arbitrary HTML or JavaScript by manipulating the redirectUrl parameter link.

Technical Details of CVE-2017-16860

Atlassian Application Links versions prior to 5.2.7, between 5.3.0 and 5.3.4, and between 5.4.0 and 5.4.3 are affected.

Vulnerability Description

The invalidRedirectUrl template in Atlassian Application Links allows remote attackers to inject arbitrary HTML or JavaScript via a cross-site scripting (XSS) vulnerability in the redirectUrl parameter link in the redirect warning message.

Affected Systems and Versions

Application Links versions earlier than 5.2.7
Versions between 5.3.0 and 5.3.4
Versions between 5.4.0 and 5.4.3

Exploitation Mechanism

Remote attackers can exploit this vulnerability by manipulating the redirectUrl parameter link in the redirect warning message.

Mitigation and Prevention

Immediate Steps to Take:

Upgrade Atlassian Application Links to version 5.2.7 or later.
Apply patches provided by Atlassian to fix the vulnerability.

Long-Term Security Practices

Regularly update and patch software to the latest versions.
Implement input validation to prevent XSS attacks.
Educate users on safe browsing practices to mitigate the risk of XSS vulnerabilities.

Patching and Updates

Ensure that all systems running Atlassian Application Links are updated to version 5.2.7 or above to address the XSS vulnerability.