| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.11.0, < 10.11.18≥ 10.11.0+incompatible, < 10.11.18+incompatible≥ 11.7.0, < 11.7.1≥ 11.7.0+incompatible, < 11.7.1+incompatible | 10.11.1810.11.18+incompatible11.7.111.7.1+incompatible |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20260518160100-9bd77d3fc4d2 | 8.0.0-20260518160100-9bd77d3fc4d2 |
| mattermost server | ≥ 10.11.0, < 10.11.18≥ 11.7.0, < 11.7.1 | 10.11.1811.7.1 |
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arbitrary bot accounts via the standard demote-user API.. Mattermost Advisory ID: MMSA-2026-00669
Running one of these products? Scan your site to see whether it exposes a vulnerable version.
Scan my site free