Vulnerability · Published Apr 24, 2025 · Assigned by Mattermost
CVE-2025-35965DoS in Mattermost Playbooks via Excessive Task Actions
Medium 6.5
In plain English
A medium-severity resource allocation without limits 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 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to validate the uniqueness and quantity of task actions within the UpdateRunTaskActions GraphQL operation, which allows an attacker to create task items containing an excessive number of actions triggered by specific posts, overloading the server and leading to a denial-of-service (DoS) condition.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-plugin-playbooks | no fix listed | GHSA-689c-xq7x-xjwf |
| Go | github.com/mattermost/mattermost-plugin-playbooks | 1.41.0 | GHSA-689c-xq7x-xjwf |
| Go | github.com/mattermost/mattermost-plugin-playbooks | 1.41.0 | GO-2025-3643 |
| Go | github.com/mattermost/mattermost-plugin-playbooks | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost-server | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost-server | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost-server | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250218121836-2b5275d87136 | GO-2025-3643 |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GHSA-689c-xq7x-xjwf |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GHSA-689c-xq7x-xjwf |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GHSA-689c-xq7x-xjwf |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GO-2025-3643 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250218121836-2b5275d87136 | GHSA-689c-xq7x-xjwf |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.4.0 – through 10.4.210.5.09.11.0 – through 9.11.10 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H