CVE-2019-16151

Published Mar 21, 2025 CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed

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

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Fortinet

FortiOS

unaffected

Version	Status	Constraints
`6.4.0`	affected	≤ 6.4.1
`6.2.0`	affected	≤ 6.2.9

Configuration 1 [-]

OR	cpe:2.3:o:fortinet:fortios::::::::
	cpe:2.3:o:fortinet:fortios::::::::

No data.

No data available yet.

Remediation

Vendor Solution

Please upgrade to FortiOS version 6.4.2 or above. Please upgrade to FortiOS version 6.2.10 or above.

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2025-7234	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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.372% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://fortiguard.com/advisory/FG-IR-19-301

History

Jul 23, 2025 4:00 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:o:fortinet:fortios::::::::

Mar 21, 2025 5:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mar 21, 2025 4:15 PM Description updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
First Time appeared		Fortinet Fortinet fortios
Weaknesses		CWE-79
CPEs		cpe:2.3:o:fortinet:fortios:6.2.0:::::::* cpe:2.3:o:fortinet:fortios:6.2.1:::::::* cpe:2.3:o:fortinet:fortios:6.2.2:::::::* cpe:2.3:o:fortinet:fortios:6.2.3:::::::* cpe:2.3:o:fortinet:fortios:6.2.4:::::::* cpe:2.3:o:fortinet:fortios:6.2.5:::::::* cpe:2.3:o:fortinet:fortios:6.2.6:::::::* cpe:2.3:o:fortinet:fortios:6.2.7:::::::* cpe:2.3:o:fortinet:fortios:6.2.8:::::::* cpe:2.3:o:fortinet:fortios:6.2.9:::::::* cpe:2.3:o:fortinet:fortios:6.4.0:::::::* cpe:2.3:o:fortinet:fortios:6.4.1:::::::*
Vendors & Products		Fortinet Fortinet fortios
References		https://fortiguard.com/advisory/FG-IR-19-301
Metrics		cvssV3_1 `{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:X/RC:X'}`