CVE-2025-6233
Arbitrary file read by system admin via path traversal
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Arbitrary file read by system admin via path traversal
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.
- Record
CVE-2025-6233- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
EUVDEUVD-2025-21866
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.
- Record
EUVD-2025-21866- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-wvw2-3jh4-4c39
Mattermost Path Traversal vulnerability
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.
- Record
GHSA-wvw2-3jh4-4c39- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-6233- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSV
Arbitrary file read by system admin via path traversal
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.
- Record
CVE-2025-6233- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-07
OSVGHSA-wvw2-3jh4-4c39
Mattermost Path Traversal vulnerability
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.
- Record
GHSA-wvw2-3jh4-4c39- CVSS 3.1
- 6.8 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N - Weakness
- CWE-22
- Updated
- 2026-11-02
OSVGO-2025-3820 No score
Mattermost Path Traversal vulnerability in github.com/mattermost/mattermost-server
Mattermost Path Traversal vulnerability in github.com/mattermost/mattermost-server
- Record
GO-2025-3820- Updated
- 2026-11-02
OSVopenSUSE-SU-2025:15405-1 No score
govulncheck-vulndb-0.0.20250730T213748-1.1 on GA media
These are all security issues fixed in the govulncheck-vulndb-0.0.20250730T213748-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2025:15405-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/mattermost/mattermost-serverGo |
10.8.0 up to 10.8.2 | 10.8.2 |
github.com/mattermost/mattermost-serverGo |
10.7.0 up to 10.7.4 | 10.7.4 |
github.com/mattermost/mattermost-serverGo |
10.5.0 up to 10.5.8 | 10.5.8 |
github.com/mattermost/mattermost-serverGo |
9.11.0 up to 9.11.17 | 9.11.17 |
github.com/mattermost/mattermost/server/v8Go |
before 8.0.0-20250529054450-d38c27f96fcf | 8.0.0-20250529054450-d38c27f96fcf |
github.com/mattermost/mattermost-serverGo |
9.11.0+incompatible up to 9.11.17+incompatible, 10.5.0+incompatible up to 10.5.8+incompatible, 10.7.0+incompatible up to 10.7.4+incompatible, 10.8.0+incompatible up to 10.8.2+incompatible | 9.11.17+incompatible10.5.8+incompatible10.7.4+incompatible10.8.2+incompatible |
github.com/mattermost/mattermost-server/v5Go |
All versions | None known |
github.com/mattermost/mattermost-server/v6Go |
All versions | None known |
govulncheck-vulndbopenSUSE:Tumbleweed From an advisory covering 56 CVEs |
before 0.0.20250730T213748-1.1 | 0.0.20250730T213748-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-6233 is a medium vulnerability (CVSS 6.8) in Mattermost, published July 18, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. Fixed in github.com/mattermost/mattermost-server 10.8.2.
References
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-6233
github.com/mattermost/mattermost/commit/d38c27f96fcf754c36f231d1f2e9dbd48ad40bab
Show 56 moreShow less
suse.com/security/cve/CVE-2024-44905