What is CVE-2019-20106?

CVE-2019-20106 is a medium-severity vulnerability in Atlassian Jira, classified under Incorrect Default Permissions. CVSS score: 4.3/10. Published 2020-02-06.

How severe is CVE-2019-20106?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Atlassian Jira

CVE-2019-20106

Comment properties in Atlassian Jira Server and Data Center before version 7.13.12, from 8.0.0 before version 8.5.4, and 8.6.0 before version 8.6.1 allows remote attackers to make comments on a ticket to which they do not have commenting permissions via a broken access control bug.

Published 2020-02-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.5th percentile), scored 2026-10-20.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Atlassian Jira
Atlassian Jira Data Center — versions 8.6.0
Atlassian Jira Server — versions 8.6.0
Atlassian Jira Server And Data Center — versions unspecified, 8.4.1, unspecified
Atlassian Jira Software Data Center

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

jira.atlassian.com/browse/JRASERVER-70543 (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2019-20106?: CVE-2019-20106 is a medium-severity vulnerability in Atlassian Jira, classified under Incorrect Default Permissions. CVSS score: 4.3/10. Published 2020-02-06.
How severe is CVE-2019-20106?: Medium severity. CVSS v3 base score is 4.3 out of 10.