CVE-2024-4195

Mattermost allows team admins to promote guests to team admins

2.7 LowFix available

Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via crafted HTTP requests.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.50%Up 0.5 points since Apr 27, 2024

What each source reports

CVE List Score used 2.7

Record: CVE-2024-4195
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-284
Updated: 2026-11-02

EUVDEUVD-2024-1100 2.7

Record: EUVD-2024-1100
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-5fh7-7mw7-mmx5 2.7

Mattermost allows team admins to promote guests to team admins

Record: GHSA-5fh7-7mw7-mmx5
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-284
Updated: 2026-11-02

NVD 2.7

Record: CVE-2024-4195
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-284
Updated: 2026-11-02

OSV 2.7

Record: CVE-2024-4195
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-284
Updated: 2026-11-02

OSVGHSA-5fh7-7mw7-mmx5 2.7

Mattermost allows team admins to promote guests to team admins

Record: GHSA-5fh7-7mw7-mmx5
CVSS 3.1: 2.7 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-284
Updated: 2026-11-02

OSVGO-2024-2793 No score

Mattermost allows team admins to promote guests to team admins in github.com/mattermost/mattermost-server

Mattermost allows team admins to promote guests to team admins in github.com/mattermost/mattermost-server

Record: GO-2024-2793
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/mattermost/mattermost-server` Go	9.5.0 to 9.5.2	9.5.3
`github.com/mattermost/mattermost-server` Go	8.1.0 to 8.1.11	8.1.12
`github.com/mattermost/mattermost-server` Go	9.5.0 up to 9.5.3	9.5.3
`github.com/mattermost/mattermost-server` Go	8.1.0 up to 8.1.12	8.1.12
`github.com/mattermost/mattermost-server` Go	8.1.0+incompatible up to 8.1.12+incompatible, 9.5.0+incompatible up to 9.5.3+incompatible	8.1.12+incompatible9.5.3+incompatible

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-4195 is a low vulnerability (CVSS 2.7) in Jenkins Mattermost, published April 26, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.50%, the 43rd percentile. Fixed in github.com/mattermost/mattermost-server 9.5.3.