Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mattermost | Mattermost | 9.5.0 (including) | 9.5.8 (excluding) |
| Mattermost | Mattermost | 9.8.0 (including) | 9.8.3 (excluding) |
| Mattermost | Mattermost | 9.9.0 (including) | 9.9.2 (excluding) |
| Mattermost | Mattermost | 9.10.0 (including) | 9.10.1 (excluding) |