What’s Vulnerable › Vulnerabilities
CVE-2019-16151
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-03-21 · updated 2026-06-17
- Weakness: CWE-79
Description
An improper neutralization of input during web page generation vulnerability [CWE-79] in FortiOS 6.4.1 and below, 6.2.9 and below may allow a remote unauthenticated attacker to either redirect users to malicious websites via a crafted "Host" header or to execute JavaScript code in the victim's browser context. This happens when the FortiGate has web filtering and category override enabled/configured.
Affected products
- Fortinet FortiOS (FortiGate): from 6.2.0 before 6.2.10; from 6.4.0 before 6.4.2 — fixed in 6.2.10, 6.4.2
How to fix
Upgrade to a fixed version: Fortinet FortiOS (FortiGate) 6.2.10, 6.4.2. Check the vendor advisory for mitigations.
References
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