Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to rate limit login requests which allows unauthenticated remote attackers to cause denial of service (server crash and restart) via HTTP/2 single packet attack with 100+ parallel login requests.. Mattermost Advisory ID: MMSA-2025-00566
| Vendor | Product | Versions |
|---|---|---|
| mattermost | mattermost_server | go/github.com/mattermost/mattermost-server: >= 11.4.0-rc1, < 11.4.1, go/github.com/mattermost/mattermost-server: >= 11.3.0-rc1, < 11.3.2, go/github.com/mattermost/mattermost-server: >= 11.2.0-rc1, < 11.2.4, go/github.com/mattermost/mattermost-server: >= 10.11.0-rc1, < 10.11.12 |
Downstream vendors/products affected by this vulnerability
| Vendor | Product | Source | Confidence |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | GHSA | 85% |
