Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, 9.5.x <= 9.5.12 fail to limit the file size for slack import file uploads which allows a user to cause a DoS via zip bomb by importing data in a team they are a team admin.
| Software | From | Fixed in |
|---|---|---|
| mattermost / mattermost_server | 9.5.0 | 9.5.13 |
| mattermost / mattermost_server | 9.11.0 | 9.11.5 |
| mattermost / mattermost_server | 10.0.0 | 10.0.3 |
| mattermost / mattermost_server | 10.1.0 | 10.1.3 |