7.5

CVE-2021-39123: atlassian data_center

Modified
Published 14-09-2021Last modified 10-10-2024

Vulnerability summary

CVE-2021-39123 is a high (CVSS 7.5) vulnerability in atlassian data_center. EPSS estimates a 1.60% chance of exploitation in the next 30 days, higher than 75.8% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 2% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
1.60%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 14-09-2021
    PublishedVulnerability first disclosed.
  2. 10-10-2024
    Last modifiedVulnerability information updated.

Description

Affected versions of Atlassian Jira Server and Data Center allow unauthenticated remote attackers to impact the application's availability via a Denial of Service (DoS) vulnerability in the /rest/gadget/1.0/createdVsResolved/generate endpoint. The affected versions are before version 8.16.0.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.60%

Chance of exploitation in the next 30 days

Percentile

76%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.60% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Atlassian4 products

1 vendor · 4 products

References

1 links