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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…

Medium4.7EPSS 0.37%
Published
Updated
Reserved
Assigned by
fortinet

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.

Scores

CVSS scores of CVE-2019-16151, by who scored it
Scored byCVSSScoreVector
fortinetCNA (assigner)3.1Medium4.7CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N/E:U/RL:X/RC:X
NVDNVD · Analyzed3.1Medium6.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS (exploitation in 30 days)
0.37% · top 69% of all CVEs (5 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.

Weakness

Affected products

  • Fortinet · FortiOS

    • affected 6.4.0 – ≤ 6.4.1
    • affected 6.2.0 – ≤ 6.2.9

What to do

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

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .