Zero-Day Advisory

Fortinet Discovers dotCMS XSS Filter Bypass Vulnerability

Summary

Fortinet's FortiGuard Labs had discovered XSS Filter Bypass vulnerability in dotCMS Core.


dotCMS is an open source content management system (CMS) written in Java for managing content and content driven sites and applications.


The vulnerability is caused by broken authorization in dotCMS Core. Upon successful exploitation, it allows attackers to launch client-side script execution in the browser's process context.



Solutions

FortiGuard Labs released the following FortiGate IPS signature which covers this specific vulnerability:

dotCMS.Core.XSSFilter.Bypass
Released Sep 08, 2022

Users should apply the solution provided by dotCMS.


Additional Information

The vulnerability affected dotCMS Core version 22.05 and below.


Timeline

Fortinet reported the vulnerability to dotCMS on 10th June, 2022.

dotCMS confirmed the vulnerability on 25th  June, 2022.

Acknowledgement

This vulnerability was discovered by Nguyen Thanh Nguyen of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.