Mattermost Playbooks allows privilege escalation through improper access control in playbook run participant management
Priority LOW 24CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00216 12th percentileScored 2026-11-07
Fix Fixed Mattermost (Mattermost): 10.9.0, 10.5.6, 9.11.16 +3github.com/mattermost/mattermost-server (Go): 0.0.0-20250513065225-4ae5d647fb88+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Mattermost | Mattermost | 10.5.0 – 10.5.5; 9.11.0 – 9.11.15; 10.8.0; 10.7.0 – 10.7.2; 10.6.0 – 10.6.5 | 10.9.0, 10.5.6, 9.11.16, 10.8.1, 10.7.3, 10.6.6 | Patch available | CNA |
| — | github.com/mattermost/mattermost-server (Go) | before 0.0.0-20250513065225-4ae5d647fb88 | 0.0.0-20250513065225-4ae5d647fb88 | Patch available | GHSA-v8fr-vxmw-6mf6 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | before 8.0.0-20250513065225-4ae5d647fb88 | 8.0.0-20250513065225-4ae5d647fb88 | Patch available | GHSA-v8fr-vxmw-6mf6 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 9.11.0 to before 9.11.16 | 9.11.16 | Patch available | GHSA-v8fr-vxmw-6mf6 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.5.0 to before 10.5.6 | 10.5.6 | Patch available | GHSA-v8fr-vxmw-6mf6 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.6.0 to before 10.6.6 | 10.6.6 | Patch available | GHSA-v8fr-vxmw-6mf6 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.7.0 to before 10.7.3 | 10.7.3 | Patch available | GHSA-v8fr-vxmw-6mf6 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.8.0 to before 10.8.1 | 10.8.1 | Patch available | GHSA-v8fr-vxmw-6mf6 |
- Mattermost VendorMattermost Affected 10.5.0 – 10.5.5; 9.11.0 – 9.11.15; 10.8.0; 10.7.0 – 10.7.2; 10.6.0 – 10.6.5 Fixed in 10.9.0, 10.5.6, 9.11.16, 10.8.1, 10.7.3, 10.6.6 Patch available CNA
- github.com/mattermost/mattermost-server (Go) Vendor— Affected before 0.0.0-20250513065225-4ae5d647fb88 Fixed in 0.0.0-20250513065225-4ae5d647fb88 Patch available GHSA-v8fr-vxmw-6mf6
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.0.0-20250513065225-4ae5d647fb88 Fixed in 8.0.0-20250513065225-4ae5d647fb88 Patch available GHSA-v8fr-vxmw-6mf6
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 9.11.0 to before 9.11.16 Fixed in 9.11.16 Patch available GHSA-v8fr-vxmw-6mf6
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 10.5.0 to before 10.5.6 Fixed in 10.5.6 Patch available GHSA-v8fr-vxmw-6mf6
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 10.6.0 to before 10.6.6 Fixed in 10.6.6 Patch available GHSA-v8fr-vxmw-6mf6
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 10.7.0 to before 10.7.3 Fixed in 10.7.3 Patch available GHSA-v8fr-vxmw-6mf6
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected 10.8.0 to before 10.8.1 Fixed in 10.8.1 Patch available GHSA-v8fr-vxmw-6mf6
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | 9.11.0 to before 9.11.16; 10.5.0 to before 10.5.6; 10.6.0 to before 10.6.6; 10.7.0 to before 10.7.3 | Vulnerable | Mattermost |
| cpe:2.3:a:mattermost:mattermost_server:10.8.0:-:*:*:*:*:*:* | 10.8.0 | Vulnerable | Mattermost |
| cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc1:*:*:*:*:*:* | 10.8.0 rc1 | Vulnerable | Mattermost |
| cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc2:*:*:*:*:*:* | 10.8.0 rc2 | Vulnerable | Mattermost |
| cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc3:*:*:*:*:*:* | 10.8.0 rc3 | Vulnerable | Mattermost |
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 9.11.0 to before 9.11.16; 10.5.0 to before 10.5.6; 10.6.0 to before 10.6.6; 10.7.0 to before 10.7.3 Vulnerable ·Mattermost
- cpe:2.3:a:mattermost:mattermost_server:10.8.0:-:*:*:*:*:*:* Versions 10.8.0 Vulnerable ·Mattermost
- cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc1:*:*:*:*:*:* Versions 10.8.0 rc1 Vulnerable ·Mattermost
- cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc2:*:*:*:*:*:* Versions 10.8.0 rc2 Vulnerable ·Mattermost
- cpe:2.3:a:mattermost:mattermost_server:10.8.0:rc3:*:*:*:*:*:* Versions 10.8.0 rc3 Vulnerable ·Mattermost
Remediation
- Fix · CNA Mattermost (Mattermost) Fixed in 10.9.0, 10.5.6, 9.11.16, 10.8.1, 10.7.3, 10.6.6
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost-server (Go) Fixed in 0.0.0-20250513065225-4ae5d647fb88 Advisory →
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.0.0-20250513065225-4ae5d647fb88 Advisory →
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 9.11.16 Advisory →
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.5.6 Advisory →
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.6.6 Advisory →
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.7.3 Advisory →
- Fix · GHSA-v8fr-vxmw-6mf6 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.8.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-46702
- 2026-10-03 Alias added: GHSA-v8fr-vxmw-6mf6
References
More Mattermost Server vulnerabilities
- TI-2025-18933 Arbitrary file read in Mattermost Boards via import & export board archive CVSS 3.1CRITICAL 9.9
- TI-2025-04465 Path Traversal Leading to RCE by Any Authenticated Mattermost User CVSS 3.1CRITICAL 9.9
- TI-2017-14068 An issue was discovered in Mattermost Server before 3.6.2. CVSS 3.1CRITICAL 9.8
- TI-2017-14060 An issue was discovered in Mattermost Server before 3.8.2, 3.7.5, and 3.6.7. CVSS 3.1CRITICAL 9.8
- TI-2017-14048 An issue was discovered in Mattermost Server before 4.1.0, 4.0.4, and 3.10.3. CVSS 3.1CRITICAL 9.8
- TI-2025-14360 Arbitrary file read via block duplication in Mattermost Boards CVSS 3.1CRITICAL 9.9
Sources
- CVE-2025-46702 · CVE Program
- CVE-2025-46702 · NVD
- FIRST EPSS
- GHSA-v8fr-vxmw-6mf6 · GitHub Advisory Database · CC BY 4.0
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