CVE-2023-2281 Archiving a team broadcasts unsanitized data over WebSockets
Attackers can view sensitive team metadata via unsanitized WebSocket events when a team is archived, exposing names and descriptions to connected clients.
- 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-2023-2281?
CVE-2023-2281 is a low-severity vulnerability in Mattermost Mattermost Server, published on 25 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
When archiving a team, Mattermost fails to sanitize the related Websocket event sent to currently connected clients. This allows the clients to see the name, display name, description, and other data about the archived team.
Weakness: CWE-200
Which versions are affected by CVE-2023-2281?
1 open source package ship an affected version, including mattermost. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mattermost Bitnami | All versions | 7.9.0 |
Products include Mattermost Mattermost Server.
How do I fix CVE-2023-2281?
Upgrade mattermost to 7.9.0 or later.
Is CVE-2023-2281 being exploited?
There is no known exploitation of CVE-2023-2281 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-2023-2281, GHSA-7qh6-7gxc-2q62.