CVE-2019-16151

low-risk
Published 2025-03-21

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.

Do I need to act?

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0.10% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Fortinet

References (1)

Vendor Advisory https://fortiguard.com/advisory/FG-IR-19-301
24
/ 100
low-risk
Severity 19/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal