Vulnerability · Published Sep 19, 2025 · Assigned by Mattermost
CVE-2025-9079Admin RCE via prepackaged plugins by way of misconfigured imports directory
High 8.0
In plain English
A high-severity path traversal in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.6%top 49.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to validate import directory path configuration which allows admin users to execute arbitrary code via malicious plugin upload to prepackaged plugins directory
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.10.2+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.4+incompatible, 9.11.18+incompatible | GO-2025-3977 |
| Go | github.com/mattermost/mattermost-server | 10.8.4 | GHSA-qx3f-6vq3-8j8m |
| Go | github.com/mattermost/mattermost-server | 9.11.18 | GHSA-qx3f-6vq3-8j8m |
| Go | github.com/mattermost/mattermost-server | 10.10.2 | GHSA-qx3f-6vq3-8j8m |
| Go | github.com/mattermost/mattermost-server | 10.9.4 | GHSA-qx3f-6vq3-8j8m |
| Go | github.com/mattermost/mattermost-server | 10.5.9 | GHSA-qx3f-6vq3-8j8m |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3977 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3977 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250707221302-a8fa77f107ef | GO-2025-3977 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250707221302-a8fa77f107ef | GHSA-qx3f-6vq3-8j8m |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.8.0 – through 10.8.310.5.0 – through 10.5.89.11.0 – through 9.11.1710.10.0 – through 10.10.110.9.0 – through 10.9.3 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H