GitHub Advisoryadvisory · Go

GHSA-3q4q-wqm6-hvf3 Mattermost has a Missing Authorization vulnerability

MEDIUM Published 2025-10-16 Modified 2025-10-16 Official page ↗
Aliases
CVE-2025-41410
Ecosystem
Go
Packages
github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-862
Reviewed
2025-10-16

Affected packages

• Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250822083415-01b95392a450 → fixed in 8.0.0-20250822083415-01b95392a450 • Go github.com/mattermost/mattermost-server: >= 10.10.0, < 10.10.3 → fixed in 10.10.3 • Go github.com/mattermost/mattermost-server: >= 10.5.0, < 10.5.11 → fixed in 10.5.11 • Go github.com/mattermost/mattermost-server: >= 10.11.0, < 10.11.3 → fixed in 10.11.3

Description

Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions.

Related

Alias · CVE (1)

  • CVE-2025-41410 Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process… vulnerability

Weakness · CWE (1)

  • CWE-862 Missing Authorization weakness

References