GitHub Advisoryadvisory · Go

GHSA-424h-xj87-m937 Mattermost has an Incorrect Authorization vulnerability

LOW Published 2025-10-16 Modified 2025-10-16 Official page ↗
Aliases
CVE-2025-10545
Ecosystem
Go
Packages
github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server
Severity
Low
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-863
Reviewed
2025-10-16

Affected packages

• Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250820115038-ff30b84049f0 → fixed in 8.0.0-20250820115038-ff30b84049f0 • 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 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint

Related

Alias · CVE (1)

  • CVE-2025-10545 Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members… vulnerability

Weakness · CWE (1)

  • CWE-863 Incorrect Authorization weakness

References