CVE-2025-36530 json
Import Path Traversal Enables Unauthorized Unsigned Plugin Installation
published 2025-08-21 14 mo ago modified 2026-06-17 4 mo ago also GHSA-gq3r-5833-5532 , GO-2025-3901 , EUVD-2025-25421
- cvss
- 6.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
Mattermost versions 10.9.x <= 10.9.1, 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate file paths during plugin import operations which allows restricted admin users to install unauthorized custom plugins via path traversal in the import functionality, bypassing plugin signature enforcement and marketplace restrictions.
Patch / fix
- go github.com/mattermost/mattermost-server 9.11.18, 9.11.18+incompatible, 10.5.9, 10.5.9+incompatible, 10.8.4, 10.8.4+incompatible, 10.9.2, 10.9.2+incompatible
- go github.com/mattermost/mattermost/server/v8 8.0.0-20250619095651-9dd0b3943e55
- Mattermost Mattermost 9.11.18, 10.5.9, 10.8.4, 10.9.2, 10.10.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 14 mo ago
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N |
| NVD | 3.1 | 4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |
| GitHub | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | >=10.9.0, <10.9.2 >=10.8.0, <10.8.4 >=10.5.0, <10.5.9 >=9.11.0, <9.11.18 >=9.11.0+incompatible, <9.11.18+incompatible >=10.5.0+incompatible, <10.5.9+incompatible >=10.8.0+incompatible, <10.8.4+incompatible >=10.9.0+incompatible, <10.9.2+incompatible |
10.9.2 10.8.4 10.5.9 9.11.18 9.11.18+incompatible 10.5.9+incompatible 10.8.4+incompatible 10.9.2+incompatible |
| go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250619095651-9dd0b3943e55 all versions |
8.0.0-20250619095651-9dd0b3943e55 |
| go | github.com/mattermost/mattermost-server/v5 | <=5.11.1 all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v6 | <=6.7.2 all versions |
no fix listed |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-36530
advisory
-
github.com
/mattermost/mattermost
package
-
pkg.go.dev
/vuln/GO-2025-3901
web
-
github.com
/advisories/GHSA-gq3r-5833-5532
advisory
Sources
- CVE List CVE-2025-36530
- GitHub Advisory GHSA-gq3r-5833-5532
- NVD CVE-2025-36530
- OSV GO-2025-3901
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