A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiOS 6.0.7 - 6.0.15, 6.2.2 - 6.2.12, 6.4.0 - 6.4.9 and 7.0.0 - 7.0.3 allows a privileged attacker to execute unauthorized code or commands via storing malicious payloads in replacement messages.