Description
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to filter invite IDs based on user permissions, which allows regular users to bypass access control restrictions and register unauthorized accounts via leaked invite IDs during team creation.. Mattermost Advisory ID: MMSA-2025-00565
Published: 2026-03-16
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized Access Control Bypass allowing creation of user accounts via exposed invite IDs
Action: Immediate Patch
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

Vendor Solution

Update Mattermost to versions 11.4.0, 11.3.1, 11.2.3, 10.11.11 or higher.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-fx49-m253-27jj Mattermost fails to filter invite IDs based on user permissions
References
History

Mon, 30 Mar 2026 07:15:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost
Mattermost server
Vendors & Products Mattermost mattermost
Mattermost server

Wed, 18 Mar 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost Server

Mon, 16 Mar 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 16 Mar 2026 11:30:00 +0000

Type Values Removed Values Added
Description Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to filter invite IDs based on user permissions, which allows regular users to bypass access control restrictions and register unauthorized accounts via leaked invite IDs during team creation.. Mattermost Advisory ID: MMSA-2025-00565
Title Unauthorized access to invite ID during team creation
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


Subscriptions

Mattermost Mattermost Mattermost Server Server
cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2026-03-16T13:49:58.332Z

Reserved: 2026-02-13T11:32:02.091Z

Link: CVE-2026-2463

cve-icon Vulnrichment

Updated: 2026-03-16T13:44:19.874Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-16T14:19:30.193

Modified: 2026-03-18T17:43:26.553

Link: CVE-2026-2463

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-30T07:02:47Z

Weaknesses