CVE-2024-28949

DoS via a large number of User Preferences

4.3 MediumFix available

Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 don't limit the number of user preferences which allows an attacker to send a large number of user preferences potentially causing denial of service.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.56%Up 0.5 points since Apr 6, 2024

What each source reports

CVE List Score used 4.3

DoS via a large number of User Preferences

Record: CVE-2024-28949
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-400
Updated: 2026-11-02

EUVDEUVD-2024-1247 4.3

Record: EUVD-2024-1247
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-03

GitHub AdvisoriesGHSA-mcw6-3256-64gg 5.3

Mattermost Server doesn't limit the number of user preferences

Record: GHSA-mcw6-3256-64gg
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-400, CWE-770
Updated: 2026-11-02

NVD 4.3

Record: CVE-2024-28949
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-400, CWE-770
Updated: 2026-11-02

OSV 4.3

DoS via a large number of User Preferences

Record: CVE-2024-28949
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-400
Updated: 2026-11-07

OSVGHSA-mcw6-3256-64gg 5.3

Mattermost Server doesn't limit the number of user preferences

Record: GHSA-mcw6-3256-64gg
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-400, CWE-770
Updated: 2026-11-02

OSVBIT-mattermost-2024-28949 No score

Record: BIT-mattermost-2024-28949
Updated: 2026-11-02

OSVGO-2024-2695 No score

Mattermost Server doesn't limit the number of user preferences in github.com/mattermost/mattermost-server

Mattermost Server doesn't limit the number of user preferences in github.com/mattermost/mattermost-server.

NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.

(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)

The additional affected modules and versions are: github.com/mattermost/mattermost/server/v8 from v8.1.0 before v8.1.11.

Record: GO-2024-2695
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/mattermost/mattermost/server/v8` Go	8.1.0 up to 8.1.11	8.1.11
`github.com/mattermost/mattermost/server/v8` Go	9.3.0 up to 9.3.3	9.3.3
`github.com/mattermost/mattermost/server/v8` Go	9.4.0 up to 9.4.4	9.4.4
`github.com/mattermost/mattermost/server/v8` Go	9.5.0 up to 9.5.2	9.5.2
`mattermost` Bitnami	8.1.0 up to 8.1.11, 9.3.0 up to 9.3.3, 9.4.0 up to 9.4.4, 9.5.0 up to 9.5.2	8.1.119.3.39.4.49.5.2
`github.com/mattermost/mattermost-server` Go	9.3.0+incompatible up to 9.3.3+incompatible, 9.4.0+incompatible up to 9.4.4+incompatible, 9.5.0+incompatible up to 9.5.2+incompatible	9.3.3+incompatible9.4.4+incompatible9.5.2+incompatible
`github.com/mattermost/mattermost-server/v5` Go	All versions	None known
`github.com/mattermost/mattermost-server/v6` Go	All versions	None known
`github.com/mattermost/mattermost/server/v8` Go	All versions	None known

History

History
Recorded	Changed	Sources
Nov 7, 2026	facts	OSV
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-2024-28949 is a medium vulnerability (CVSS 4.3) in Mattermost, published April 5, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 46th percentile. Fixed in github.com/mattermost/mattermost/server/v8 8.1.11.