CVE-2019-20886
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes...
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.
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
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.
- Record
CVE-2019-20886- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-269
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.
- Record
CVE-2019-20886- Updated
- 2026-11-02
EUVDEUVD-2019-11423 No score
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.
- Record
EUVD-2019-11423- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-gg2f-8p5w-8x48 No score
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes...
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.
- Record
GHSA-gg2f-8p5w-8x48- Updated
- 2026-11-02
OSV
An issue was discovered in Mattermost Server before 5.8.0. The first user is sometimes inadvertently a system admin.
- Record
CVE-2019-20886- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-2019-20886 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 0.89%, the 59th percentile. No source names a fixed version.