An improper neutralization of input during web page generation ('Cross-site Scripting') [CWE-79] vulnerability in FortiOS may allow an unauthenticated remote attacker to perform a reflected cross site scripting (XSS) attack in the captive portal authentication replacement page.
FortiOS version 7.0.0 through 7.0.5
FortiOS 6.4 all versions.
Please upgrade to FortiGate version 7.0.6 or above.
Please upgrade to FortiGate version 7.2.0 or above.