CVE-2024-39839
Medium
Description
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Mattermost Server
PublishedAug 1, 2024
First seenAug 1, 2024
Weakness typeCWE-284Improper access control
How to fix
Update
- mattermost mattermost_server9.5.7, 9.7.6, 9.8.2 or later
- github.com/mattermost/mattermost/server/v89.5.7, 9.7.6, 9.8.2, 9.9.1 or later
- github.com/mattermost/mattermost-server9.5.7+incompatible, 9.7.6+incompatible, 9.8.2+incompatible, 9.9.1+incompatible or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 9.5.0 ≤ v < 9.5.7, 9.7.0 ≤ v < 9.7.6, 9.8.0 ≤ v < 9.8.2, 9.9.0 | 9.5.7, 9.7.6, 9.8.2 |
| github.com/mattermost/mattermost/server/v8Go | 9.5.0 ≤ v < 9.5.7, 9.7.0 ≤ v < 9.7.6, 9.8.0 ≤ v < 9.8.2, 9.9.0 ≤ v < 9.9.1, No range specified | 9.5.7, 9.7.6, 9.8.2, 9.9.1 |
| github.com/mattermost/mattermost-serverGo | 9.5.0+incompatible ≤ v < 9.5.7+incompatible, 9.7.0+incompatible ≤ v < 9.7.6+incompatible, 9.8.0+incompatible ≤ v < 9.8.2+incompatible, 9.9.0+incompatible ≤ v < 9.9.1+incompatible | 9.5.7+incompatible, 9.7.6+incompatible, 9.8.2+incompatible, 9.9.1+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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