CVE-2020-4027

Name: CVE-2020-4027
Creator: NVD / NIST
Published: 2020-07-01T02:15:12.35+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.7/10EPSS 1.52%

Last modified Jun 17, 2026

CVE-2020-4027 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. Affected versions of Atlassian Confluence Server and Data Center allowed remote attackers with system administration permissions to bypass velocity template injection mitigations via an injection vulnerability in custom user macros. The affected versions are before version 7.4.5, and from version 7.5.0 before 7.5.1.. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

Description

Affected versions of Atlassian Confluence Server and Data Center allowed remote attackers with system administration permissions to bypass velocity template injection mitigations via an injection vulnerability in custom user macros. The affected versions are before version 7.4.5, and from version 7.5.0 before 7.5.1.

Metrics

CVSS 3.1

4.7/10

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

EPSS Probability

1.52%

71.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Atlassian	Confluence	< 7.4.5
Atlassian	Confluence Server	>= 7.5.0, < 7.5.1

References

https://jira.atlassian.com/browse/CONFSERVER-59898Issue Tracking, Patch, Release Notes, Vendor Advisory
https://jira.atlassian.com/browse/CONFSERVER-59898Issue Tracking, Patch, Release Notes, Vendor Advisory

Timeline

Published: Jul 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4027?

How severe is CVE-2020-4027?

CVE-2020-4027 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4027?

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-2020-4027?

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

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Source: NVD / NIST