Zero-Day Advisory

Fortinet Discovers OpenProject Attachment Denial Of Service Vulnerability


Fortinet's FortiGuard Labs has discovered a Denial Of Service Vulnerability in OpenProject.

OpenProject is a web-based project management system for location-independent team collaboration.

OpenProject is susceptible to a Denial Of Service vulnerability when filename is passed as an integer value to the upload attachment API.


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

Released Nov 12, 2019

Users should apply patch provided by OpenProject


Fortinet reported the vulnerability to OpenProject on 21 October, 2019. 

OpenProject confirmed the vulnerability on 31 October, 2019. 

OpenProject released patch for the vulnerability on 12 November, 2019.


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.