Arbitrary file read by system admin via path traversal
Priority LOW 30CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.
Summary
Mattermost versions 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to sanitize input paths of file attachments in the bulk import JSONL file, which allows a system admin to read arbitrary system files via path traversal.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00446 39th percentileScored 2026-11-08
Fix Fixed Mattermost (Mattermost): 10.9.0, 10.8.2, 10.7.4 +2github.com/mattermost/mattermost-server (Go): 10.8.2, 10.7.4, 10.5.8 +1+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 | 10.8.0 – 10.8.1; 10.7.0 – 10.7.3; 10.5.0 – 10.5.7; 9.11.0 – 9.11.16 | 10.9.0, 10.8.2, 10.7.4, 10.5.8, 9.11.17 | Patch available | CNA |
| — | github.com/mattermost/mattermost-server (Go) | 10.8.0 to before 10.8.2 | 10.8.2 | Patch available | GHSA-wvw2-3jh4-4c39 |
| — | github.com/mattermost/mattermost-server (Go) | 10.7.0 to before 10.7.4 | 10.7.4 | Patch available | GHSA-wvw2-3jh4-4c39 |
| — | github.com/mattermost/mattermost-server (Go) | 10.5.0 to before 10.5.8 | 10.5.8 | Patch available | GHSA-wvw2-3jh4-4c39 |
| — | github.com/mattermost/mattermost-server (Go) | 9.11.0 to before 9.11.17 | 9.11.17 | Patch available | GHSA-wvw2-3jh4-4c39 |
| — | github.com/mattermost/mattermost/server/v8 (Go) | before 8.0.0-20250529054450-d38c27f96fcf | 8.0.0-20250529054450-d38c27f96fcf | Patch available | GHSA-wvw2-3jh4-4c39 |
- Mattermost VendorMattermost Affected 10.8.0 – 10.8.1; 10.7.0 – 10.7.3; 10.5.0 – 10.5.7; 9.11.0 – 9.11.16 Fixed in 10.9.0, 10.8.2, 10.7.4, 10.5.8, 9.11.17 Patch available CNA
- github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.8.0 to before 10.8.2 Fixed in 10.8.2 Patch available GHSA-wvw2-3jh4-4c39
- github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.7.0 to before 10.7.4 Fixed in 10.7.4 Patch available GHSA-wvw2-3jh4-4c39
- github.com/mattermost/mattermost-server (Go) Vendor— Affected 10.5.0 to before 10.5.8 Fixed in 10.5.8 Patch available GHSA-wvw2-3jh4-4c39
- github.com/mattermost/mattermost-server (Go) Vendor— Affected 9.11.0 to before 9.11.17 Fixed in 9.11.17 Patch available GHSA-wvw2-3jh4-4c39
- github.com/mattermost/mattermost/server/v8 (Go) Vendor— Affected before 8.0.0-20250529054450-d38c27f96fcf Fixed in 8.0.0-20250529054450-d38c27f96fcf Patch available GHSA-wvw2-3jh4-4c39
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | 9.11.0 to before 9.11.17; 10.5.0 to before 10.5.8; 10.7.0 to before 10.7.4; 10.8.0 to before 10.8.2 | Vulnerable | Mattermost |
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* Versions 9.11.0 to before 9.11.17; 10.5.0 to before 10.5.8; 10.7.0 to before 10.7.4; 10.8.0 to before 10.8.2 Vulnerable ·Mattermost
Remediation
- Fix · CNA Mattermost (Mattermost) Fixed in 10.9.0, 10.8.2, 10.7.4, 10.5.8, 9.11.17
- Fix · GHSA-wvw2-3jh4-4c39 github.com/mattermost/mattermost-server (Go) Fixed in 10.8.2 Advisory →
- Fix · GHSA-wvw2-3jh4-4c39 github.com/mattermost/mattermost-server (Go) Fixed in 10.7.4 Advisory →
- Fix · GHSA-wvw2-3jh4-4c39 github.com/mattermost/mattermost-server (Go) Fixed in 10.5.8 Advisory →
- Fix · GHSA-wvw2-3jh4-4c39 github.com/mattermost/mattermost-server (Go) Fixed in 9.11.17 Advisory →
- Fix · GHSA-wvw2-3jh4-4c39 github.com/mattermost/mattermost/server/v8 (Go) Fixed in 8.0.0-20250529054450-d38c27f96fcf Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-6233
- 2026-10-03 Alias added: GHSA-wvw2-3jh4-4c39
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-2025-6233 · CVE Program
- CVE-2025-6233 · NVD
- FIRST EPSS
- GHSA-wvw2-3jh4-4c39 · 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