CVE-2020-4020

7.2 highEPSS 1.7%

High (7.2) in atlassian companion. EPSS 1.7% chance of exploitation in the next 30 days.

The file downloading functionality in the Atlassian Companion App before version 1.0.0 allows remote attackers, who control a Confluence Server instance that the Companion App is connected to, execute arbitrary .exe files via a Protection Mechanism Failure.

Severity

CVSS 3.1

7.2 high

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)
Published: 2020-06-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

atlassian:companion

References

https://jira.atlassian.com/browse/CONFSERVER-59733
https://jira.atlassian.com/browse/CONFSERVER-59733

Check your stack JSON