What is CVE-2017-3128?

CVE-2017-3128 is a medium-severity vulnerability in Fortinet Fortios, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2017-05-23.

How severe is CVE-2017-3128?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Fortinet Fortios

CVE-2017-3128

A stored XSS (Cross-Site-Scripting) vulnerability in Fortinet FortiOS allows attackers to execute unauthorized code or commands via the policy global-label parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-05-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Fortinet Fortios — versions 5.0.0-5.0.14, 5.2.0-5.2.10
Fortinet Fortios — versions 5.0.0, 5.0.1, 5.0.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fortiguard.com/psirt/FG-IR-17-057 (Vendor Advisory)
www.securitytracker.com/id/1038541 (vdb-entry)
www.securityfocus.com/bid/98514 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-3128?: CVE-2017-3128 is a medium-severity vulnerability in Fortinet Fortios, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2017-05-23.
How severe is CVE-2017-3128?: Medium severity. CVSS v3 base score is 4.8 out of 10.