CVE-2019-20846
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server...
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server-local file storage.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server-local file storage.
- Record
CVE-2019-20846- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-281
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server-local file storage.
- Record
CVE-2019-20846- Updated
- 2026-11-02
EUVDEUVD-2019-11383 No score
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server-local file storage.
- Record
EUVD-2019-11383- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rp22-r29g-4974 No score
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server...
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server-local file storage.
- Record
GHSA-rp22-r29g-4974- Updated
- 2026-11-02
OSV
An issue was discovered in Mattermost Server before 5.18.0. It has weak permissions for server-local file storage.
- Record
CVE-2019-20846- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-20846 is a high vulnerability (CVSS 7.5) in Mattermost Server, published June 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. No source names a fixed version.