CVE-2024-40884 Unauthorized disabling of invite URL
Team admins lacking specific permissions can improperly disable invite URLs, bypassing intended access controls in Mattermost.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-40884?
CVE-2024-40884 is a low-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 22 Aug 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Mattermost versions 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 fail to properly enforce permissions which allows a team admin user without "Add Team Members" permission to disable the invite URL.
Weakness: CWE-284
Which versions are affected by CVE-2024-40884?
9 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, mattermost and github.com/mattermost/mattermost-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/mattermost/mattermost/server/v8 Go | All versions | None |
github.com/mattermost/mattermost/server/v8 Go | From 9.10.0 | 9.10.1 |
github.com/mattermost/mattermost/server/v8 Go | From 9.10.0 | 9.10.1 |
github.com/mattermost/mattermost/server/v8 Go | From 9.5.0 | 9.5.8 |
github.com/mattermost/mattermost/server/v8 Go | From 9.5.0 | 9.5.8 |
mattermost Bitnami | From 9.5.0 to 9.10.0 | 9.5.8 |
3 more packages
github.com/mattermost/mattermost-server Go | From 9.5.0+incompatible | 9.5.8+incompatible, 9.10.1+incompatible |
github.com/mattermost/mattermost-server/v5 Go | All versions | None |
github.com/mattermost/mattermost-server/v6 Go | All versions | None |
Products include Mattermost Mattermost Server.
How do I fix CVE-2024-40884?
Upgrade github.com/mattermost/mattermost/server/v8 to a fixed version for your release line: 9.10.1 or 9.5.8.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-40884 being exploited?
There is no known exploitation of CVE-2024-40884 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-2024-40884, GHSA-3j95-8g47-fpwh, GO-2024-3090.