Zero-Day Advisory

Fortinet Discovers Roundcube Webmail Brute Force Vulnerability


Fortinet's FortiGuard Labs has discovered a brute-force vulnerability in Roundcube webmail.

Roundcube is a free and open source webmail solution with a desktop-like user interface which is easy to install/configure and it runs on a standard LAMPP server.

The vulnerability exists due to insufficient anti-brute-force protection. It can be exploited to gain users' Roundcube credentials.


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

Released Jan 04, 2016
Users should apply the solution provided by Roundcube.

Additional Information

The vulnerability was fixed in Roundcube webmail version 1.1.4.


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.