How severe is CVE-2018-20826?

CVE-2018-20826 has a CVSS 3.x base score of 4.3, 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 low, and availability none.

Is CVE-2018-20826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20826?

CVE-2018-20826 affects Atlassian Jira. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20826?

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

When was CVE-2018-20826 published?

CVE-2018-20826 was published on 2019-08-09 and last updated on 2026-06-17.

CVE-2018-20826

CVE-2018-20826 is a medium-severity vulnerability in Atlassian Jira 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Atlassian Jira
Published: 2019-08-09
Last modified: 2026-06-17

Description

The inline-create rest resource in Jira before version 7.12.3 allows authenticated remote attackers to set the reporter in issues via a missing authorisation check.

Frequently asked questions

What is CVE-2018-20826?: The inline-create rest resource in Jira before version 7.12.3 allows authenticated remote attackers to set the reporter in issues via a missing authorisation check.
How severe is CVE-2018-20826?: CVE-2018-20826 has a CVSS 3.x base score of 4.3, 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 low, and availability none.
Is CVE-2018-20826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20826?: CVE-2018-20826 affects Atlassian Jira. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20826 published?: CVE-2018-20826 was published on 2019-08-09 and last updated on 2026-06-17.

References

https://jira.atlassian.com/browse/JRASERVER-69239

Affected products (1)

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

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