Vulnerability · Published Oct 16, 2025 · Assigned by Mattermost
CVE-2025-58075Arbitrary Mattermost Team can be joined by manipulating the SAML RelayState
High 8.1
In plain English
A high-severity missing authorization 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 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.3%top 71.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.11.2 | GHSA-r6qj-894f-5hr2 |
| Go | github.com/mattermost/mattermost-server | 10.10.3 | GHSA-r6qj-894f-5hr2 |
| Go | github.com/mattermost/mattermost-server | 10.5.11 | GHSA-r6qj-894f-5hr2 |
| Go | github.com/mattermost/mattermost-server | 10.10.3+incompatible, 10.11.2+incompatible, 10.5.11+incompatible | GO-2025-4035 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-4035 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-4035 |
| Go | github.com/mattermost/mattermost/server/v8 | no fix listed | GO-2025-4035 |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250815100400-2d5cdc6e217e | GHSA-r6qj-894f-5hr2 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.11.0 – through 10.11.110.10.0 – through 10.10.210.5.0 – through 10.5.10 |
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N