Zero-Day Advisory

Fortinet Discovers Zabbix Cross-Site Scripting Vulnerability


Fortinet's FortiGuard Labs discovered a cross-site scripting (XSS) vulnerability in Zabbix. The vulnerability exists because Zabbix fails to validate the data from users. It allows remote attackers to inject malicious script/HTML code.

Zabbix is an open source enterprise monitoring software for networks and applications, created in Latvia by Alexei Vladishev. It is designed to monitor and track the status of various network services, servers, and other network hardware.

The XSS vulnerability exists due to insufficiently sanitizing user-supplied data in HTTP request sent to actionconf.php so that remote attackers can exploit it to launch a reflected XSS attack by enticing target users to visit a malicious URL.


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

Released Mar 19, 2015

For now, the vendor has no solution for the issue.


Fortinet reported the vulnerability to Zabbix on March 9, 2015.

Three years had passed. Zabbix still did not respond.


This vulnerability was discovered by Honggang Ren 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.