CVE-2025-13324
Low
Description
Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.
SeverityLow
CVSS3.7
Exploit probability—
Product
Mattermost Server
PublishedDec 17, 2025
First seenDec 17, 2025
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- mattermost mattermost_server10.11.6, 10.12.3, 11.0.5 or later
- github.com/mattermost/mattermost10.12.2, 10.11.5, 11.0.4, 10.11.5+incompatible, 10.12.2+incompatible, 11.0.4+incompatible or later
- github.com/mattermost/mattermost/server/v88.0.0-20251031095924-e7e23b94e006 or later
- github.com/mattermost/mattermost-server11.0.4, 11.0.4+incompatible or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.6, 10.12.0 ≤ v < 10.12.3, 11.0.0 ≤ v < 11.0.5 | 10.11.6, 10.12.3, 11.0.5 |
| github.com/mattermost/mattermostGo | 10.12.0 ≤ v < 10.12.2, 10.11.0-rc1 ≤ v < 10.11.5, 11.0.0-alpha.1 ≤ v < 11.0.4, 10.11.0-rc1+incompatible ≤ v < 10.11.5+incompatible, 10.12.0+incompatible ≤ v < 10.12.2+incompatible, 11.0.0-alpha.1+incompatible ≤ v < 11.0.4+incompatible | 10.12.2, 10.11.5, 11.0.4, 10.11.5+incompatible, 10.12.2+incompatible, 11.0.4+incompatible |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20251031095924-e7e23b94e006 | 8.0.0-20251031095924-e7e23b94e006 |
| github.com/mattermost/mattermost-serverGo | v < 11.0.4, v < 11.0.4+incompatible | 11.0.4, 11.0.4+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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