Description
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate board blocks when importing boards which allows an attacker could read any arbitrary file on the system via importing and exporting a specially crafted import archive in Boards.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 10.4.0 – ≤ 10.4.1, 9.11.0 – ≤ 9.11.7, 10.3.0 – ≤ 10.3.2, 10.2.0 – ≤ 10.2.2 | 10.5.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | govulncheck-vulndb | 0.0.20250312T181707-1.1 | openSUSE-SU-2025:14889-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 2 repositories
-
numanturle/CVE-2025-25279 ★ 4 · Feb 24, 2025
-
AbokorMAHAMMADMOUSSE/CVE-2025-25279-Mattermost-Path-Traversal ★ 0 · Apr 24, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 9.11.0-rc1+incompatible, < 9.11.8+incompatible · >= 10.2.0-rc1+incompatible, < 10.2.3+incompatible · >= 10.3.0-rc1+incompatible, < 10.3.3+incompatible · >= 10.4.0-rc1+incompatible, < 10.4.2+incompatible | 9.11.8+incompatible, 10.2.3+incompatible, 10.3.3+incompatible, 10.4.2+incompatible | GO-2025-3480 |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2025-3480 |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2025-3480 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250122165010-4ed702ccff4e | 8.0.0-20250122165010-4ed702ccff4e | GHSA-5fwx-p6xh-vjrh |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.11.0-rc1, < 9.11.8 | 9.11.8 | GHSA-5fwx-p6xh-vjrh |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.2.0-rc1, < 10.2.3 | 10.2.3 | GHSA-5fwx-p6xh-vjrh |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.3.0-rc1, < 10.3.3 | 10.3.3 | GHSA-5fwx-p6xh-vjrh |
| Go | github.com/mattermost/mattermost/server/v8 | >= 10.4.0-rc1, < 10.4.2 | 10.4.2 | GHSA-5fwx-p6xh-vjrh |
Advisories 3
- openSUSE-SU-2025:14889-1 govulncheck-vulndb-0.0.20250312T181707-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0187 Mattermost: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 24, 2025
- NCSC-2025-0068 Kwetsbaarheden verholpen in Mattermost NCSC-NL (Netherlands) · Feb 24, 2025