What is CVE-2020-6647?

CVE-2020-6647 is a medium-severity vulnerability in Fortinet Fortiadc Firmware, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-04-07.

How severe is CVE-2020-6647?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Fortinet Fortiadc Firmware

CVE-2020-6647

An improper neutralization of input vulnerability in the dashboard of FortiADC may allow an authenticated attacker to perform a cross site scripting attack (XSS) via the name parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Fortinet Fortiadc Firmware — versions 5.4.0
Fortinet Fortiadc — versions FortiADC 5.4.0 and 5.3.x before 5.3.5.

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fortiguard.com/psirt/FG-IR-20-012 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-6647?: CVE-2020-6647 is a medium-severity vulnerability in Fortinet Fortiadc Firmware, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-04-07.
How severe is CVE-2020-6647?: Medium severity. CVSS v3 base score is 5.4 out of 10.