What is CVE-2019-5590?

CVE-2019-5590 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-28.

How severe is CVE-2019-5590?

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

XSS in Fortinet Fortiweb

CVE-2019-5590

The URL part of the report message is not encoded in Fortinet FortiWeb 6.0.2 and below which may allow an attacker to execute unauthorized code or commands (Cross Site Scripting) via attack reports generated in HTML form.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-08-28 · 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: 0.010 (60.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Fortinet Fortiweb — versions 6.0.2 and below

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/bid/108786 (VDB Entry, Third Party Advisory, vdb-entry)
fortiguard.com/advisory/FG-IR-19-070 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-5590?: CVE-2019-5590 is a medium-severity vulnerability in Fortinet Fortiweb, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-08-28.
How severe is CVE-2019-5590?: Medium severity. CVSS v3 base score is 6.1 out of 10.