CVE-2025-35965
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mattermost Server
PublishedApr 24, 2025
First seenApr 24, 2025
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- mattermost mattermost_server9.11.11, 10.4.3 or later
- github.com/mattermost/mattermost/server/v88.0.0-20250218121836-2b5275d87136 or later
- github.com/mattermost/mattermost-plugin-playbooks1.41.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 9.11.0 ≤ v < 9.11.11, 10.4.0 ≤ v < 10.4.3, 10.5.0 | 9.11.11, 10.4.3 |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20250218121836-2b5275d87136, 10.4.0 ≤ v, 10.5.0 ≤ v, 9.11.0 ≤ v, No range specified | 8.0.0-20250218121836-2b5275d87136 |
| github.com/mattermost/mattermost-plugin-playbooksGo | 2.0.0 ≤ v, v < 1.41.0, No range specified | 1.41.0 |
| github.com/mattermost/mattermost-serverGo | 9.11.0+incompatible ≤ v, 10.4.0+incompatible ≤ v, 10.5.0+incompatible ≤ v | — |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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