Description
Mattermost version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 8.1.0 – ≤ 8.1.8 | 9.4 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 9.0.0+incompatible, < 9.4.0+incompatible | 9.4.0+incompatible | GO-2024-2635 |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2024-2635 |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2024-2635 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.0.0, < 9.4.0 | 9.4.0 | GHSA-r4fm-g65h-cr54 |
| Go | github.com/mattermost/mattermost/server/v8 | all versions | — | GO-2024-2635 |