What is CVE-2020-4019?

CVE-2020-4019 is a high-severity vulnerability in Atlassian Companion, classified under Untrusted Search Path. CVSS score: 7.8/10. Published 2020-06-01.

How severe is CVE-2020-4019?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Atlassian Companion

CVE-2020-4019

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.

Published 2020-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (26.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Atlassian Companion
Atlassian Companion App — versions unspecified

Weakness classification (CWE)

CWE-426 — Untrusted Search Path

References

jira.atlassian.com/browse/CONFSERVER-59734 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-4019?: CVE-2020-4019 is a high-severity vulnerability in Atlassian Companion, classified under Untrusted Search Path. CVSS score: 7.8/10. Published 2020-06-01.
How severe is CVE-2020-4019?: High severity. CVSS v3 base score is 7.8 out of 10.