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CVE-2020-4028

20
FAUCET Score

CVE-2020-4028 is an information disclosure vulnerability affecting Atlassian Jira and Jira Software Data Center versions prior to 8.9.1. Instead of redirecting unauthenticated users to a login page, certain resources would return a 404 error, allowing attackers to infer the existence of those resources. This vulnerability has a CVSSv3.1 score of 5.3 (Medium), indicating a low-complexity attack with potential for limited confidentiality impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.9.1CPE matchmatch criteria
cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
< 8.9.1CPE matchmatch criteria
cpe:2.3:a:atlassian:jira_software_data_center:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 34th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jira.atlassian.com / browse/JRASERVER-71175
Issue TrackingVendor Advisory