Mattermost versions 9.11.x <= 9.11.0 and 9.5.x <= 9.5.8 fail to validate that the message of the permalink post is a string, which allows an attacker to send a non-string value as the message of a permalink post and crash the frontend.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mattermost_server | Mattermost | 9.5.0 (including) | 9.5.9 (excluding) |
| Mattermost_server | Mattermost | 9.11.0 (including) | 9.11.0 (including) |
| Mattermost_server | Mattermost | 9.11.0-rc1 (including) | 9.11.0-rc1 (including) |
| Mattermost_server | Mattermost | 9.11.0-rc2 (including) | 9.11.0-rc2 (including) |
| Mattermost_server | Mattermost | 9.11.0-rc3 (including) | 9.11.0-rc3 (including) |