Vulnerability · Published Jul 18, 2025 · Assigned by Mattermost
CVE-2025-6227Invite token is used as part of the secure communication
Low 2.2
In plain English
A low-severity security flaw 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 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.2Low
Exploit odds (30 days)0.2%top 87.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.5.8+incompatible, 9.11.17+incompatible | GO-2025-3818 |
| Go | github.com/mattermost/mattermost-server | 9.11.17 | GHSA-4fwj-8595-wp25 |
| Go | github.com/mattermost/mattermost-server | 10.5.8 | GHSA-4fwj-8595-wp25 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3818 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3818 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250612074655-8f8612c63783 | GO-2025-3818 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250612074655-8f8612c63783 | GHSA-4fwj-8595-wp25 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.5.0 – through 10.5.79.11.0 – through 9.11.16 |
Weakness: CWE-522 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N