CVE-2025-46702 Mattermost Playbooks allows privilege escalation through improper access control in playbook run participant management
Authenticated users can bypass permission restrictions to manage private channel members, leading to privilege escalation and unauthorized data access.
- 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-2025-46702?
CVE-2025-46702 is a medium-severity missing authorization vulnerability in Mattermost Mattermost Server, published on 30 Jun 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions when adding participants to playbook runs. This allows authenticated users with member-level permissions to bypass system admin restrictions and add or remove users to/from private channels via the playbook run participants feature, even when the 'Manage Members' permission has been explicitly removed. This can lead to unauthorized access to sensitive channel content and allow guest users to gain channel management privileges.
Weakness: CWE-863
Which versions are affected by CVE-2025-46702?
18 open source packages ship an affected version, including github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server and github.com/mattermost/mattermost-server/v5. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20250513065225-4ae5d647fb88 |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20250513065225-4ae5d647fb88 |
github.com/mattermost/mattermost/server/v8 Go | All versions | 8.0.0-20250513065225-4ae5d647fb88 |
github.com/mattermost/mattermost/server/v8 Go | From 10.5.0 | 10.5.6 |
github.com/mattermost/mattermost/server/v8 Go | From 10.5.0 | 10.5.6 |
github.com/mattermost/mattermost/server/v8 Go | From 10.6.0 | 10.6.6 |
12 more packages
github.com/mattermost/mattermost/server/v8 Go | From 10.6.0 | 10.6.6 |
github.com/mattermost/mattermost/server/v8 Go | From 10.7.0 | 10.7.3 |
github.com/mattermost/mattermost/server/v8 Go | From 10.7.0 | 10.7.3 |
github.com/mattermost/mattermost/server/v8 Go | From 10.8.0 | 10.8.1 |
github.com/mattermost/mattermost/server/v8 Go | From 10.8.0 | 10.8.1 |
github.com/mattermost/mattermost/server/v8 Go | From 9.11.0 | 9.11.16 |
github.com/mattermost/mattermost/server/v8 Go | From 9.11.0 | 9.11.16 |
github.com/mattermost/mattermost-server Go | All versions | 0.0.0-20250513065225-4ae5d647fb88, 9.11.16+incompatible, 10.5.6+incompatible, 10.6.6+incompatible, 10.7.3+incompatible, 10.8.1+incompatible |
github.com/mattermost/mattermost-server Go | All versions | 0.0.0-20250513065225-4ae5d647fb88 |
github.com/mattermost/mattermost-server Go | All versions | 0.0.0-20250513065225-4ae5d647fb88 |
github.com/mattermost/mattermost-server/v5 Go | All versions | None |
github.com/mattermost/mattermost-server/v6 Go | All versions | None |
Products include Mattermost Mattermost Server.
How do I fix CVE-2025-46702?
Upgrade github.com/mattermost/mattermost/server/v8 to a fixed version for your release line: 8.0.0-20250513065225-4ae5d647fb88, 10.5.6, 10.6.6 or 10.7.3.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-46702 being exploited?
There is no known exploitation of CVE-2025-46702 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 GHSA-v8fr-vxmw-6mf6, GO-2025-3796.