CVE-2024-2447 Mattermost fails to authenticate the source of certain types of post actions
An authenticated attacker can create posts as other users by exploiting missing source authentication in post actions.
- 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-2024-2447?
CVE-2024-2447 is a medium-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 5 Apr 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost versions 8.1.x before 8.1.11, 9.3.x before 9.3.3, 9.4.x before 9.4.4, and 9.5.x before 9.5.2 fail to authenticate the source of certain types of post actions, allowing an authenticated attacker to create posts as other users via a crafted post action.
Which versions are affected by CVE-2024-2447?
13 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 8.1.0 | 8.1.11 |
github.com/mattermost/mattermost/server/v8 Go | From 8.1.0 | 8.1.11 |
github.com/mattermost/mattermost/server/v8 Go | From 9.3.0 | 9.3.3 |
github.com/mattermost/mattermost/server/v8 Go | From 9.3.0 | 9.3.3 |
github.com/mattermost/mattermost/server/v8 Go | From 9.4.0 | 9.4.4 |
7 more packages
github.com/mattermost/mattermost/server/v8 Go | From 9.4.0 | 9.4.4 |
github.com/mattermost/mattermost/server/v8 Go | From 9.5.0 | 9.5.2 |
github.com/mattermost/mattermost/server/v8 Go | From 9.5.0 | 9.5.2 |
mattermost Bitnami | From 8.1.0 | 8.1.11, 9.3.3, 9.4.4, 9.5.2 |
github.com/mattermost/mattermost-server Go | From 9.3.0+incompatible | 9.3.3+incompatible, 9.4.4+incompatible, 9.5.2+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-2024-2447?
Upgrade github.com/mattermost/mattermost/server/v8 to a fixed version for your release line: 8.1.11, 9.3.3, 9.4.4 or 9.5.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-2447 being exploited?
There is no known exploitation of CVE-2024-2447 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-2024-2447, GHSA-wp43-vprh-c3w5, GO-2024-2696.