CVE-2020-4019

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-01 · updated 2026-06-17
Weakness: CWE-426

Description

The file editing functionality in the Atlassian Companion App before version 1.0.0 allows local attackers to have the app run a different executable in place of the app's cmd.exe via a untrusted search path vulnerability.

Affected products

Atlassian Companion App: before 1.0.0 — fixed in 1.0.0

How to fix

Upgrade to a fixed version: Atlassian Companion App 1.0.0. Check the vendor advisory for mitigations.

References

https://jira.atlassian.com/browse/CONFSERVER-59734
https://jira.atlassian.com/browse/CONFSERVER-59734

Get alerted when CVE-2020-4019 or the next vulnerability affects your stack