How severe is CVE-2021-39115?

CVE-2021-39115 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-39115 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39115?

CVE-2021-39115 primarily affects Atlassian Jira Service Desk. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-39115?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-39115 published?

CVE-2021-39115 was published on 2021-09-01 and last updated on 2026-06-17.

CVE-2021-39115

CVE-2021-39115 is a high-severity vulnerability in Atlassian Jira Service Desk with a CVSS 3.x base score of 7.2. 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-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Atlassian Jira Service Desk
Published: 2021-09-01
Last modified: 2026-06-17

Description

Affected versions of Atlassian Jira Service Management Server and Data Center allow remote attackers with "Jira Administrators" access to execute arbitrary Java code or run arbitrary system commands via a Server_Side Template Injection vulnerability in the Email Template feature. The affected versions are before version 4.13.9, and from version 4.14.0 before 4.18.0.

Frequently asked questions

What is CVE-2021-39115?: Affected versions of Atlassian Jira Service Management Server and Data Center allow remote attackers with "Jira Administrators" access to execute arbitrary Java code or run arbitrary system commands via a Server_Side Template Injection vulnerability in the Email Template feature. The affected versions are before version 4.13.9, and from version 4.14.0 before 4.18.0.
How severe is CVE-2021-39115?: CVE-2021-39115 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-39115 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39115?: CVE-2021-39115 primarily affects Atlassian Jira Service Desk. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-39115?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-39115 published?: CVE-2021-39115 was published on 2021-09-01 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JSDSERVER-8665

Affected products (4)

cpe:2.3:a:atlassian:jira_service_desk:*:*:*:*:data_center:*:*:*
cpe:2.3:a:atlassian:jira_service_desk:*:*:*:*:server:*:*:*
cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:data_center:*:*:*
cpe:2.3:a:atlassian:jira_service_management:*:*:*:*:server:*:*:*

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