How severe is CVE-2019-8450?

CVE-2019-8450 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-2019-8450 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-8450?

CVE-2019-8450 affects Atlassian Jira Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-8450?

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

When was CVE-2019-8450 published?

CVE-2019-8450 was published on 2019-09-11 and last updated on 2026-06-17.

CVE-2019-8450

CVE-2019-8450 is a medium-severity vulnerability in Atlassian Jira Server 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% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Atlassian Jira Server
Published: 2019-09-11
Last modified: 2026-06-17

Description

Various templates of the Optimization plugin in Jira before version 7.13.6, and from version 8.0.0 before version 8.4.0 allow remote attackers who have permission to manage custom fields to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the name of a custom field.

Frequently asked questions

What is CVE-2019-8450?: Various templates of the Optimization plugin in Jira before version 7.13.6, and from version 8.0.0 before version 8.4.0 allow remote attackers who have permission to manage custom fields to inject arbitrary HTML or JavaScript via a cross site scripting (XSS) vulnerability in the name of a custom field.
How severe is CVE-2019-8450?: CVE-2019-8450 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-2019-8450 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-8450?: CVE-2019-8450 affects Atlassian Jira Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-8450?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-8450 published?: CVE-2019-8450 was published on 2019-09-11 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JRASERVER-69795

Affected products (1)

cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*

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