CVE-2024-1952 Mattermost incorrectly allows access individual posts
An authenticated attacker can read private channel posts via unsanitized permalink data in ephemeral post updates.
- 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-2024-1952?
CVE-2024-1952 is a low-severity vulnerability in Mattermost Mattermost Server, published on 29 Feb 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.
Weakness: CWE-200
Which versions are affected by CVE-2024-1952?
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 | None |
github.com/mattermost/mattermost/server/v8 Go | From 9.0.0 | 9.4.0 |
github.com/mattermost/mattermost/server/v8 Go | From 9.0.0 | 9.4.0 |
mattermost Bitnami | From 8.1.0 | 8.1.9 |
github.com/mattermost/mattermost-server Go | From 9.0.0+incompatible | 9.4.0+incompatible |
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-2024-1952?
Upgrade github.com/mattermost/mattermost/server/v8 to 9.4.0 or later.
Is CVE-2024-1952 being exploited?
There is no known exploitation of CVE-2024-1952 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-2024-1952, GHSA-r4fm-g65h-cr54, GO-2024-2635.