| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 4.1.0, < 4.1.1≥ 4.1.0+incompatible, < 4.1.1+incompatible≥ 4.2.0-rc1, < 4.2.0≥ 4.2.0-rc1+incompatible, < 4.2.0+incompatible< 4.0.5< 4.0.5+incompatible | 4.1.14.1.1+incompatible4.2.04.2.0+incompatible4.0.54.0.5+incompatible |
| mattermost server | = 4.2.0≥ 4.1.0, < 4.1.1< 4.0.5 | 4.1.14.0.5 |
An issue was discovered in Mattermost Server before 4.2.0, 4.1.1, and 4.0.5, when used as an OAuth 2.0 service provider. Resource-owner authorization can be intermittently bypassed, allowing account takeover.
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