Unauthorized Guest user access to Playbook
Priority LOW 20CWE-863Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · None · 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 retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00294 22nd percentileScored 2026-11-07
Fix Fixed Mattermost (Mattermost): 10.9.0, 10.5.6, 9.11.16 +3github.com/mattermost/mattermost-server (Go): 0.0.0-20250520060012-d0380305ef7a+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 0.0.0-20250520060012-d0380305ef7a | 0.0.0-20250520060012-d0380305ef7a | Patch available | GHSA-4578-6gjh-f2jm |
| — | github.com/mattermost/mattermost/server/v8 (Go) | before 8.0.0-20250520060012-d0380305ef7a | 8.0.0-20250520060012-d0380305ef7a | Patch available | GHSA-4578-6gjh-f2jm |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.5.0 to before 10.5.6 | 10.5.6 | Patch available | GHSA-4578-6gjh-f2jm |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 9.11.0 to before 9.11.16 | 9.11.16 | Patch available | GHSA-4578-6gjh-f2jm |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.8.0 to before 10.8.1 | 10.8.1 | Patch available | GHSA-4578-6gjh-f2jm |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.7.0 to before 10.7.3 | 10.7.3 | Patch available | GHSA-4578-6gjh-f2jm |
| — | github.com/mattermost/mattermost/server/v8 (Go) | 10.6.0 to before 10.6.6 | 10.6.6 | Patch available | GHSA-4578-6gjh-f2jm |
- 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 0.0.0-20250520060012-d0380305ef7a Fixed in 0.0.0-20250520060012-d0380305ef7a Patch available GHSA-4578-6gjh-f2jm
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.0.0-20250520060012-d0380305ef7a Fixed in 8.0.0-20250520060012-d0380305ef7a Patch available GHSA-4578-6gjh-f2jm
- 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-4578-6gjh-f2jm
- 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-4578-6gjh-f2jm
- 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-4578-6gjh-f2jm
- 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-4578-6gjh-f2jm
- 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-4578-6gjh-f2jm
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-4578-6gjh-f2jm github.com/mattermost/mattermost-server (Go) Fixed in 0.0.0-20250520060012-d0380305ef7a Advisory →
- Fix · GHSA-4578-6gjh-f2jm github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.0.0-20250520060012-d0380305ef7a Advisory →
- Fix · GHSA-4578-6gjh-f2jm github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.5.6 Advisory →
- Fix · GHSA-4578-6gjh-f2jm github.com/mattermost/mattermost/server/v8 (Go) Fixed in 9.11.16 Advisory →
- Fix · GHSA-4578-6gjh-f2jm github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.8.1 Advisory →
- Fix · GHSA-4578-6gjh-f2jm github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.7.3 Advisory →
- Fix · GHSA-4578-6gjh-f2jm github.com/mattermost/mattermost/server/v8 (Go) Fixed in 10.6.6 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-3228
- 2026-10-03 Alias added: GHSA-4578-6gjh-f2jm
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-2025-3228 · CVE Program
- CVE-2025-3228 · NVD
- FIRST EPSS
- GHSA-4578-6gjh-f2jm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences