CVE-2023-3584 Member can create team with team override scheme
An authenticated attacker can create a new team with a specific override scheme by bypassing authorization checks on the team creation API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-3584?
CVE-2023-3584 is a low-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 17 Jul 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost fails to properly check the authorization of POST /api/v4/teams when passing a team override scheme ID in the request, allowing an authenticated attacker with knowledge of a Team Override Scheme ID to create a new team with said team override scheme.
Weakness: CWE-863
Which versions are affected by CVE-2023-3584?
1 open source package ship an affected version, including mattermost. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mattermost Bitnami | From 7.8.0 | 7.8.5, 7.10.3 |
Products include Mattermost Mattermost Server.
How do I fix CVE-2023-3584?
Upgrade mattermost to a fixed version for your release line: 7.8.5 or 7.10.3.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2023-3584 being exploited?
There is no known exploitation of CVE-2023-3584 in the wild and no public exploit code.
Other vulnerabilities in Mattermost Mattermost Server
- CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers
- CVE-2025-12421 Account Takeover via Code Exchange Endpoint
- CVE-2025-4981 Path Traversal Leading to RCE by Any Authenticated Mattermost User
- CVE-2025-20051 Arbitrary file read via block duplication in Mattermost Boards
- CVE-2025-25279 Arbitrary file read in Mattermost Boards via import & export board archive
Sources
Also known as BIT-mattermost-2023-3584, GHSA-w2wm-ccwh-3737.