CVE-2024-31859 Member promoted to channel admin via playbooks run linking to channel
Attackers can escalate privileges to channel admin by running playbooks in existing channels due to missing authorization checks in Mattermost.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-31859?
CVE-2024-31859 is a medium-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 26 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to perform proper authorization checks which allows a member running a playbook in an existing channel to be promoted to a channel admin
Weakness: CWE-284
Which versions are affected by CVE-2024-31859?
It affects 1 product.
Products include Mattermost Mattermost Server.
How do I fix CVE-2024-31859?
No fix has been published for CVE-2024-31859 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2024-31859 being exploited?
There is no known exploitation of CVE-2024-31859 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