CVE-2024-47003 DoS via non-string message using permalink embed
An attacker can crash the Mattermost frontend by sending a non-string value as a permalink message, causing a denial of service.
- 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-2024-47003?
CVE-2024-47003 is a low-severity denial of service vulnerability in Mattermost Mattermost Server, published on 26 Sep 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost versions 9.11.x <= 9.11.0 and 9.5.x <= 9.5.8 fail to validate that the message of the permalink post is a string, which allows an attacker to send a non-string value as the message of a permalink post and crash the frontend.
Weakness: CWE-400
Which versions are affected by CVE-2024-47003?
7 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 | 8.0.0-20240806094731-69a8b3df0f9f |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20240806094731-69a8b3df0f9f |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20240806094731-69a8b3df0f9f |
mattermost Bitnami | From 9.5.0 to 9.11.0-rc1 | 9.5.9 |
github.com/mattermost/mattermost-server Go | All versions | None |
github.com/mattermost/mattermost-server/v5 Go | All versions | None |
1 more packages
github.com/mattermost/mattermost-server/v6 Go | All versions | None |
Products include Mattermost Mattermost Server.
How do I fix CVE-2024-47003?
Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20240806094731-69a8b3df0f9f or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2024-47003 being exploited?
There is no known exploitation of CVE-2024-47003 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-2024-47003, GHSA-59hf-mpf8-pqjh, GO-2024-3164.