CVE-2023-49874 IDOR when updating the tasks of a private playbook run
Guest users can modify tasks in private playbook runs by guessing the run ID, bypassing intended access restrictions.
- 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-2023-49874?
CVE-2023-49874 is a medium-severity missing authorization 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 check whether a user is a guest when updating the tasks of a private playbook run allowing a guest to update the tasks of a private playbook run if they know the run ID.
Weakness: CWE-284
Which versions are affected by CVE-2023-49874?
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-2023-49874?
Upgrade mattermost to a fixed version for your release line: 7.8.15, 8.1.6, 9.0.4 or 9.1.3.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2023-49874 being exploited?
There is no known exploitation of CVE-2023-49874 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-2023-49874, GHSA-5gq6-83ww-xr95.