| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.10.0, < 10.10.3≥ 10.10.0+incompatible, < 10.10.3+incompatible≥ 10.11.0, < 10.11.3≥ 10.11.0+incompatible, < 10.11.3+incompatible≥ 10.5.0, < 10.5.11≥ 10.5.0+incompatible, < 10.5.11+incompatible | 10.10.310.10.3+incompatible10.11.310.11.3+incompatible10.5.1110.5.11+incompatible |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250822083415-01b95392a450all versions | 8.0.0-20250822083415-01b95392a450 |
| mattermost server | ≥ 10.10.0, < 10.10.3≥ 10.11.0, < 10.11.3≥ 10.5.0, < 10.5.11 | 10.10.310.11.310.5.11 |
Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions.
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