Servers and applications
CVE-2024-39839
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.
- Severity
- Medium 4.3
- Published
- 1 Aug 2024
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Fixed in
- 9.5.7, 9.7.6, 9.8.2
- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
MattermostServers and applications · cpe:a:mattermost:mattermost_server |
|