How severe is CVE-2021-43945?

CVE-2021-43945 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-43945 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43945?

CVE-2021-43945 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-2021-43945?

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

When was CVE-2021-43945 published?

CVE-2021-43945 was published on 2022-02-28 and last updated on 2026-06-17.

CVE-2021-43945

CVE-2021-43945 is a medium-severity vulnerability in Atlassian Data Center with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Atlassian Data Center
Published: 2022-02-28
Last modified: 2026-06-17

Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers with Roadmaps Administrator permissions to inject arbitrary HTML or JavaScript via a Stored Cross-Site Scripting (SXSS) vulnerability in the /rest/jpo/1.0/hierarchyConfiguration endpoint. The affected versions are before version 8.20.3.

Frequently asked questions

What is CVE-2021-43945?: Affected versions of Atlassian Jira Server and Data Center allow remote attackers with Roadmaps Administrator permissions to inject arbitrary HTML or JavaScript via a Stored Cross-Site Scripting (SXSS) vulnerability in the /rest/jpo/1.0/hierarchyConfiguration endpoint. The affected versions are before version 8.20.3.
How severe is CVE-2021-43945?: CVE-2021-43945 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-43945 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43945?: CVE-2021-43945 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-2021-43945?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-43945 published?: CVE-2021-43945 was published on 2022-02-28 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JRASERVER-73069

Affected products (2)

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

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