CVE-2020-4028

Name: CVE-2020-4028
Creator: NVD / NIST
Published: 2020-06-23T13:15:17.76+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.86%

Last modified Jun 17, 2026

CVE-2020-4028 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Versions before 8.9.1, Various resources in Jira responded with a 404 instead of redirecting unauthenticated users to the login page, in some situations this may have allowed unauthorised attackers to determine if certain resources exist or not through an Information Disclosure vulnerability.. EPSS estimates a 0.86% chance of exploitation in the next 30 days.

Description

Versions before 8.9.1, Various resources in Jira responded with a 404 instead of redirecting unauthenticated users to the login page, in some situations this may have allowed unauthorised attackers to determine if certain resources exist or not through an Information Disclosure vulnerability.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.86%

53.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Atlassian	Jira	< 8.9.1
Atlassian	Jira Software Data Center	< 8.9.1

References

https://jira.atlassian.com/browse/JRASERVER-71175Issue Tracking, Vendor Advisory
https://jira.atlassian.com/browse/JRASERVER-71175Issue Tracking, Vendor Advisory

Timeline

Published: Jun 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4028?

How severe is CVE-2020-4028?

CVE-2020-4028 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.86% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4028?

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-2020-4028?

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

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Source: NVD / NIST