Medium severity · published Mar 21, 2025
CVE-2019-16151
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…
6.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FO
FortiOS · Fortinet
6.2.0 before 6.2.10; 6.4.0 before 6.4.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16151
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-16151
Vendor Advisory
https://fortiguard.com/advisory/FG-IR-19-301
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