What is CVE-2020-29444?

CVE-2020-29444 is a medium-severity vulnerability in Atlassian Confluence Data Center, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-05-07.

How severe is CVE-2020-29444?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Atlassian Confluence Data Center

CVE-2020-29444

Affected versions of Team Calendar in Confluence Server before 7.11.0 allow attackers to inject arbitrary HTML or Javascript via a Cross Site Scripting Vulnerability in admin global setting parameters.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-05-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (59.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Atlassian Confluence Data Center
Atlassian Confluence Server — versions unspecified
Atlassian Confluence Server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jira.atlassian.com/browse/CONFSERVER-61266 (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-29444?: CVE-2020-29444 is a medium-severity vulnerability in Atlassian Confluence Data Center, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-05-07.
How severe is CVE-2020-29444?: Medium severity. CVSS v3 base score is 5.4 out of 10.