CVE-2020-7799

Name: CVE-2020-7799
Creator: NVD / NIST
Published: 2020-01-28T13:15:12.56+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 19.81%

Last modified Jun 17, 2026

CVE-2020-7799 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. An issue was discovered in FusionAuth before 1.11.0. An authenticated user, allowed to edit e-mail templates (Home -> Settings -> Email Templates) or themes (Home -> Settings -> Themes), can execute commands on the underlying operating system by abusing freemarker.template.utility.Execute in the Apache FreeMarker engine that processes custom templates.. EPSS estimates a 19.81% chance of exploitation in the next 30 days.

Description

An issue was discovered in FusionAuth before 1.11.0. An authenticated user, allowed to edit e-mail templates (Home -> Settings -> Email Templates) or themes (Home -> Settings -> Themes), can execute commands on the underlying operating system by abusing freemarker.template.utility.Execute in the Apache FreeMarker engine that processes custom templates.

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

19.81%

97.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-917

Affected Software

Vendor	Product	Versions
Fusionauth	Fusionauth	< 1.11.0

References

http://packetstormsecurity.com/files/156102/FusionAuth-1.10-Remote-Command-Execution.htmlThird Party Advisory, VDB Entry
https://fusionauth.io/docs/v1/tech/release-notesExploit, Release Notes, Vendor Advisory
https://lab.mediaservice.net/advisory/2020-03-fusionauth.txtThird Party Advisory
https://seclists.org/bugtraq/2020/Jan/39Mailing List, Third Party Advisory
http://packetstormsecurity.com/files/156102/FusionAuth-1.10-Remote-Command-Execution.htmlThird Party Advisory, VDB Entry
https://fusionauth.io/docs/v1/tech/release-notesExploit, Release Notes, Vendor Advisory
https://lab.mediaservice.net/advisory/2020-03-fusionauth.txtThird Party Advisory
https://seclists.org/bugtraq/2020/Jan/39Mailing List, Third Party Advisory

Timeline

Published: Jan 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7799?

How severe is CVE-2020-7799?

CVE-2020-7799 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 19.81% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7799?

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-2020-7799?

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

Scan your code now

Source: NVD / NIST