CVE-2023-3587 Inconsistent state in UI after boards permission change by system admin
System admins can inadvertently grant editor access to boards via sharing links due to UI state inconsistencies, allowing unauthorized users to modify board content.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-3587?
CVE-2023-3587 is a low-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 17 Jul 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Mattermost fails to properly show information in the UI, allowing a system admin to modify a board state allowing any user with a valid sharing link to join the board with editor access, without the UI showing the updated permissions.
Weakness: CWE-862
Which versions are affected by CVE-2023-3587?
1 open source package ship an affected version, including mattermost. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mattermost Bitnami | From 7.8.0 | 7.8.7, 7.10.3 |
Products include Mattermost Mattermost Server.
How do I fix CVE-2023-3587?
Upgrade mattermost to a fixed version for your release line: 7.8.7 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-2023-3587 being exploited?
There is no known exploitation of CVE-2023-3587 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-2023-3587, GHSA-rg67-9vmj-5rpg.