Vulnerability · Published May 15, 2025 · Assigned by Mattermost
CVE-2025-3446Members Without Guest Invite Permissions Can Add Guests to Teams
Medium 4.3
In plain English
A medium-severity incorrect authorization in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.4.5+incompatible, 10.5.3+incompatible, 10.6.2+incompatible, 9.11.12+incompatible | GO-2025-3693 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3693 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3693 |
| Go | github.com/mattermost/mattermost/server/v8 | 9.11.12 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250415054241-76ab3867b785 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | 10.6.2 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250415054241-76ab3867b785 | GO-2025-3693 |
| Go | github.com/mattermost/mattermost/server/v8 | 10.5.3 | GHSA-r7r2-m3vr-c8qc |
| Go | github.com/mattermost/mattermost/server/v8 | 10.4.5 | GHSA-r7r2-m3vr-c8qc |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.6.0 – through 10.6.110.5.0 – through 10.5.210.4.0 – through 10.4.49.11.0 – through 9.11.11 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N