CVE-2023-3586 Disabling publicly-shared boards does not disable existing publicly available board links
Attackers can access previously shared public boards even after the feature is disabled, bypassing intended access controls.
- 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-2023-3586?
CVE-2023-3586 is a medium-severity 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 disable public Boards after the "Enable Publicly-Shared Boards" configuration option is disabled, resulting in previously-shared public Boards to remain accessible.
Weakness: CWE-863
Which versions are affected by CVE-2023-3586?
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, 7.9.5, 7.10.3 |
Products include Mattermost Mattermost Server.
How do I fix CVE-2023-3586?
Upgrade mattermost to a fixed version for your release line: 7.8.7, 7.9.5 or 7.10.3.
Is CVE-2023-3586 being exploited?
There is no known exploitation of CVE-2023-3586 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-2023-3586, GHSA-6wc4-xc3f-782r.