medium4.3
CVE-2025-20033
Mattermost Improper Validation of Specified Type of Input vulnerability
Impact
Mattermost versions 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post types, which allows attackers to deny service to users with the sysconsole_read_plugins permission via creating a post with the custom_pl_notification type and specific props.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | >= 9.11.0, < 9.11.16 | 9.11.16 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 9.11.0 before 9.11.6 from 10.0.0 before 10.0.4 from 10.1.0 before 10.1.4 from 10.2.0 before 10.2.1 |