CVE-2020-4020 json
The file downloading functionality in the Atlassian Companion App before version 1.0.0 allows remote attackers, who control a Confluence Se…
published 2020-06-01 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-25285
- cvss
- 7.2
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Atlassian Companion App 1.0.0
Exploit prediction
1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Atlassian Companion App
References
-
jira.atlassian.com
/browse/CONFSERVER-59733
vendor-advisory
Sources
- CVE List CVE-2020-4020
- NVD CVE-2020-4020
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.