Kentico CMS Cross-Site Scripting Vulnerability in Additional Database Installation Wizard

A cross-site scripting vulnerability has been identified in Kentico CMS versions prior to 13.0.178. The issue resides in the Additional Database Installation Wizard component, specifically within the '/CMSInstall/install.aspx' file. The vulnerability is triggered by manipulating the 'new database' argument, allowing for the injection of malicious scripts. This issue can be exploited remotely, but requires authentication and user interaction.

Impact

Exploitation of this vulnerability allows for cross-site scripting, where an attacker can inject malicious scripts that are executed in the context of the user's browser.

Reproduction

To reproduce this vulnerability, log into the Kentico CMS application and navigate to the database configuration page. Enter a payload containing a script into the 'new database' field. Once the form is submitted, the injected script will be executed, demonstrating the cross-site scripting vulnerability.

Remediation

Users are advised to upgrade to Kentico CMS version 13.0.179, which addresses this vulnerability. The hotfix can be downloaded from the Kentico DevNet.