MEDIUM
An issue was discovered in Mattermost Server before 5.1
Published Jun 19, 2020
4.3
MEDIUMCVSS 3.1
EPSS 0.61%
Description
An issue was discovered in Mattermost Server before 5.1. An attacker can bypass intended access control (for direct-message channel creation) via the Message slash command.
Affected products
No data.
- < 5.1.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
4.3 MEDIUM NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact Low
Availability Impact None
No CVSS v3.0 score for this CVE.
4.0 MEDIUM NVD
AV:N/AC:L/Au:S/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
0.61% 0.00615
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.00615
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.61% (0.00615) | 47.65th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.61% (0.00615) | 48.09th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.05% (0.00054) | 23.20th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.05% (0.00054) | 22.70th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00054) | 20.65th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.42% (0.00416) | 10.04th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
Weaknesses (1)
References (1)
- https://mattermost.com/security-updates/ x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://mattermost.com/security-updates/ | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 19, 2020
Updated Aug 5, 2024
Reserved Jun 19, 2020
Link CVE-2018-21254
CISA Vulnrichment
Updated n/a