How severe is CVE-2021-39124?

CVE-2021-39124 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2021-39124 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39124?

CVE-2021-39124 primarily affects Atlassian Data Center. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-39124?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-39124 published?

CVE-2021-39124 was published on 2021-09-14 and last updated on 2026-06-17.

CVE-2021-39124

CVE-2021-39124 is a medium-severity vulnerability in Atlassian Data Center with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Atlassian Data Center
Published: 2021-09-14
Last modified: 2026-06-17

Description

The Cross-Site Request Forgery (CSRF) failure retry feature of Atlassian Jira Server and Data Center before version 8.16.0 allows remote attackers who are able to trick a user into retrying a request to bypass CSRF protection and replay a crafted request.

Frequently asked questions

What is CVE-2021-39124?: The Cross-Site Request Forgery (CSRF) failure retry feature of Atlassian Jira Server and Data Center before version 8.16.0 allows remote attackers who are able to trick a user into retrying a request to bypass CSRF protection and replay a crafted request.
How severe is CVE-2021-39124?: CVE-2021-39124 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2021-39124 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39124?: CVE-2021-39124 primarily affects Atlassian Data Center. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-39124?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-39124 published?: CVE-2021-39124 was published on 2021-09-14 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JRASERVER-72761

Affected products (2)

cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*

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