Zero-Day Advisory

Fortinet Discovers Ignite Realtime Openfire Cross-Site Scripting Vulnerability


Fortinet's FortiGuard Labs has discovered a reflected Cross-Site Scripting (XSS) vulnerability in Ignite Realtime Openfire.

Openfire is a realtime collaboration (RTC) server licensed under the Open Source Apache License. It uses the widely adopted open protocol for instant messaging, XMPP (also called Jabber).

A reflected XSS vulnerability has been discovered in Openfire 4.2.3 and earlier versions. It is caused by inadequate filtering on the search function.


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

Released Apr 17, 2019
No vendor patch is available for now and the vendor has no plan to fix it either.


Fortinet reported the vulnerability to Ignite Realtime on Dec 6, 2018.

Ignite Realtime confirmed the vulnerability on Apr 17, 2019.


This vulnerability was discovered by Zhouyuan Yang 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.