CVE-2022-3147 Server-side Denial of Service while processing a specifically crafted JPEG file
Authenticated users can cause server-side denial of service by uploading crafted JPEG files, exhausting resources on specific configurations.
- 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-2022-3147?
CVE-2022-3147 is a low-severity denial of service vulnerability in Mattermost Mattermost Server, published on 9 Sep 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost version 7.0.x and earlier fails to sufficiently limit the in-memory sizes of concurrently uploaded JPEG images, which allows authenticated users to cause resource exhaustion on specific system configurations, resulting in server-side Denial of Service.
Which versions are affected by CVE-2022-3147?
1 open source package ship an affected version, including mattermost. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mattermost Bitnami | All versions | 7.1.0 |
Products include Mattermost Mattermost Server.
How do I fix CVE-2022-3147?
Upgrade mattermost to 7.1.0 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-2022-3147 being exploited?
There is no known exploitation of CVE-2022-3147 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-2022-3147, GHSA-9rmc-xf66-rv68.