How severe is CVE-2019-20418?

CVE-2019-20418 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-20418 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20418?

CVE-2019-20418 primarily affects Atlassian Jira. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-20418?

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

When was CVE-2019-20418 published?

CVE-2019-20418 was published on 2020-07-03 and last updated on 2026-06-17.

CVE-2019-20418

CVE-2019-20418 is a medium-severity vulnerability in Atlassian Jira with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Atlassian Jira
Published: 2020-07-03
Last modified: 2026-06-17

Description

Affected versions of Atlassian Jira Server and Data Center allow remote attackers to prevent users from accessing the instance via an Application Denial of Service vulnerability in the /rendering/wiki endpoint. The affected versions are before version 8.8.0.

Frequently asked questions

What is CVE-2019-20418?: Affected versions of Atlassian Jira Server and Data Center allow remote attackers to prevent users from accessing the instance via an Application Denial of Service vulnerability in the /rendering/wiki endpoint. The affected versions are before version 8.8.0.
How severe is CVE-2019-20418?: CVE-2019-20418 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-20418 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20418?: CVE-2019-20418 primarily affects Atlassian Jira. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-20418?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-20418 published?: CVE-2019-20418 was published on 2020-07-03 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JRASERVER-70943

Affected products (2)

cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_software_data_center:*:*:*:*:*:*:*:*

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