CVE-2023-49607 Playbook plugin crash via missing interface type assertion
An attacker can crash the Mattermost Playbook plugin by sending a malformed reminder parameter, 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-2023-49607?
CVE-2023-49607 is a medium-severity denial of service vulnerability in Mattermost Mattermost Server, published on 12 Dec 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost fails to validate the type of the "reminder" body request parameter allowing an attacker to crash the Playbook Plugin when updating the status dialog.
Weakness: CWE-754
Which versions are affected by CVE-2023-49607?
1 open source package ship an affected version, including mattermost. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mattermost Bitnami | All versions | 7.8.15, 8.1.6, 9.0.4, 9.1.3, 9.2.2 |
Products include Mattermost Mattermost Server.
How do I fix CVE-2023-49607?
Upgrade mattermost to a fixed version for your release line: 7.8.15, 8.1.6, 9.0.4 or 9.1.3.
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-2023-49607 being exploited?
There is no known exploitation of CVE-2023-49607 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-2023-49607, GHSA-g6qp-9v7f-3wh3.