What is CVE-2017-3129?

CVE-2017-3129 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-05-27.

How severe is CVE-2017-3129?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Fortinet Fortiweb

CVE-2017-3129

A Cross-Site Scripting vulnerability in Fortinet FortiWeb versions 5.7.1 and below allows attacker to execute unauthorized code or commands via an improperly sanitized POST parameter in the FortiWeb Site Publisher feature.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-05-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.8th percentile), scored 2026-09-29.

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 Fortiweb
Fortinet, Inc. Fortinet Fortiweb — versions FortiWeb versions 5.7.1 and below

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fortiguard.com/psirt/FG-IR-17-076 (Vendor Advisory)
www.securityfocus.com/bid/98382 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-3129?: CVE-2017-3129 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-05-27.
How severe is CVE-2017-3129?: Medium severity. CVSS v3 base score is 6.1 out of 10.