CVE-2019-20881
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks...
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.
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
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.
- Record
CVE-2019-20881- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-307
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.
- Record
CVE-2019-20881- Updated
- 2026-11-02
EUVDEUVD-2019-11418 No score
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.
- Record
EUVD-2019-11418- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-r4pj-mfcc-hfr5 No score
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks...
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.
- Record
GHSA-r4pj-mfcc-hfr5- Weakness
- CWE-522
- Updated
- 2026-11-02
OSV
An issue was discovered in Mattermost Server before 5.8.0. It mishandles brute-force attacks against MFA.
- Record
CVE-2019-20881- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - 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-2019-20881 is a high vulnerability (CVSS 7.3) 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 0.83%, the 57th percentile. No source names a fixed version.