CVE-2020-6646

Name: CVE-2020-6646
Creator: NVD / NIST
Published: 2020-03-17T13:15:12.027+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2020-6646 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. An improper neutralization of input vulnerability in FortiWeb allows a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the Disclaimer Description of a Replacement Message.. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

Description

An improper neutralization of input vulnerability in FortiWeb allows a remote authenticated attacker to perform a stored cross site scripting attack (XSS) via the Disclaimer Description of a Replacement Message.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.80%

52.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Fortinet	Fortiweb	<= 6.2.2
Fortinet	Fortiweb	6.3.0

References

https://fortiguard.com/advisory/FG-IR-20-001Vendor Advisory
https://fortiguard.com/advisory/FG-IR-20-001Vendor Advisory

Timeline

Published: Mar 17, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6646?

How severe is CVE-2020-6646?

CVE-2020-6646 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6646?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-6646?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST