How severe is CVE-2017-7734?

CVE-2017-7734 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2017-7734 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7734?

CVE-2017-7734 primarily affects Fortinet Fortios. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-7734?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-7734 published?

CVE-2017-7734 was published on 2017-09-12 and last updated on 2026-06-17.

CVE-2017-7734

CVE-2017-7734 is a medium-severity vulnerability in Fortinet Fortios with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Fortinet Fortios
Published: 2017-09-12
Last modified: 2026-06-17

Description

A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.4.0 through 5.4.4 allows attackers to execute unauthorized code or commands via 'Comments' while saving Config Revisions.

Frequently asked questions

What is CVE-2017-7734?: A Cross-Site Scripting vulnerability in Fortinet FortiOS versions 5.4.0 through 5.4.4 allows attackers to execute unauthorized code or commands via 'Comments' while saving Config Revisions.
How severe is CVE-2017-7734?: CVE-2017-7734 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2017-7734 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7734?: CVE-2017-7734 primarily affects Fortinet Fortios. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-7734?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-7734 published?: CVE-2017-7734 was published on 2017-09-12 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:fortinet:fortios:5.4.0:*:*:*:*:*:*:*
cpe:2.3:o:fortinet:fortios:5.4.1:*:*:*:*:*:*:*
cpe:2.3:o:fortinet:fortios:5.4.2:*:*:*:*:*:*:*
cpe:2.3:o:fortinet:fortios:5.4.3:*:*:*:*:*:*:*
cpe:2.3:o:fortinet:fortios:5.4.4:*:*:*:*:*:*:*

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