FortiOS open redirect vulnerability

FortiOS open redirect vulnerability


The FortiOS webui accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect. The redirect input parameter is also prone to a cross site scripting.


Open redirect

Affected Products



Upgrade to one the following FortiOS versions:
  • 5.0 branch: 5.0.13 or above
  • 5.2 branch: 5.2.3 or above
  • 5.4 branch: 5.4.0 or above
4.3 and lower branches are not affected by this vulnerability.


Fortinet is pleased to thanks to Javier Nieto from for reporting a FortiOS vulnerability under responsible disclosure