CVE-2020-4028 — 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

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MEDIUM

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

Published Jun 23, 2020

5.3

MEDIUM

CVSS 3.1

EPSS 0.86%

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.

Affected products

Vendor Atlassian Product Jira Server and Data Center Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <8.9.1

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Atlassian

Jira Server and Data Center

n/a

Version	Status	Constraints
unspecified	affected	<8.9.1

Remediation

No remediation recorded yet.

Metrics

0.86% 0.00862

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.00862

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	0.86% (0.00862)	57.13th	v5 (v2026.06.15)
Sep 20, 2026	0.86% (0.00862)	56.99th	v5 (v2026.06.15)
Jul 20, 2024	0.13% (0.00125)	47.54th	v3 (v2023.03.01)
Sep 3, 2023	0.13% (0.00125)	46.24th	v3 (v2023.03.01)
Mar 7, 2023	0.11% (0.00109)	42.30th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	4.50% (0.04499)	74.08th	v2 (v2022.01.01)
Feb 3, 2022	1.84% (0.01840)	47.83th	v1
Jan 6, 2022	1.84% (0.01840)	47.32th	v1
Jan 5, 2022	0.42% (0.00416)	26.65th	v5 (v2026.06.15)
Apr 14, 2021	0.42% (0.00416)	0.00th	v1

Weaknesses (1)

CWE-203

References (1)

https://jira.atlassian.com/browse/JRASERVER-71175
x_refsource_MISCIssue TrackingVendor Advisory

Link	Providers	Tags
https://jira.atlassian.com/browse/JRASERVER-71175		x_refsource_MISCIssue TrackingVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner atlassian

Published Jun 23, 2020

Updated Sep 16, 2024

Reserved Dec 30, 2019

Link CVE-2020-4028

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-4028

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-4028