CVE-2025-12421
6 advisories.
Go/github.com/mattermost/mattermost/server/v8 CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251022210333-acda1fb5dd46 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251022210333-acda1fb5dd46Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 8.0.0-20251022210333-acda1fb5dd46 | - |
Fixed versions
| 8.0.0-20251022210333-acda1fb5dd46 |
Sources
- osv: GHSA-mp6x-97xj-9x62
- https://nvd.nist.gov/vuln/detail/CVE-2025-12421
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange
Action: Upgrade github.com/mattermost/mattermost-server to 10.5.13 or later.
go get github.com/mattermost/mattermost-server@v11.0.3go get github.com/mattermost/mattermost-server@v10.12.2go get github.com/mattermost/mattermost-server@v10.11.5go get github.com/mattermost/mattermost-server@v10.5.13Affected
| introduced | fixed | last affected |
|---|---|---|
| 11.0.0 | 11.0.3 | - |
| 10.12.0 | 10.12.2 | - |
| 10.11.0 | 10.11.5 | - |
| 10.5.0 | 10.5.13 | - |
Fixed versions
| 11.0.3 | 10.12.2 | 10.11.5 | 10.5.13 |
Sources
- osv: GHSA-mp6x-97xj-9x62#Go/github.com/mattermost/mattermost-server
- https://nvd.nist.gov/vuln/detail/CVE-2025-12421
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://github.com/mattermost/mattermost
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON
Go/github.com/mattermost/mattermost-server CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2025-4170
- nvd: CVE-2025-12421
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v5 CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2025-4170#Go/github.com/mattermost/mattermost-server/v5
- nvd: CVE-2025-12421
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON
Go/github.com/mattermost/mattermost-server/v6 CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | - |
Fixed versions
No fixed version in the source.
Sources
- osv: GO-2025-4170#Go/github.com/mattermost/mattermost-server/v6
- nvd: CVE-2025-12421
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON
Go/github.com/mattermost/mattermost/server/v8 CVE-2025-12421: critical 9.9, EPSS 0.34%
Mattermost fails to to verify the token used during code exchange in github.com/mattermost/mattermost-server
Action: Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251022210333-acda1fb5dd46 or later.
go get github.com/mattermost/mattermost/server/v8@v8.0.0-20251022210333-acda1fb5dd46Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 8.0.0-20251022210333-acda1fb5dd46 | - |
Fixed versions
| 8.0.0-20251022210333-acda1fb5dd46 |
Sources
- osv: GO-2025-4170#Go/github.com/mattermost/mattermost/server/v8
- nvd: CVE-2025-12421
- https://github.com/advisories/GHSA-mp6x-97xj-9x62
- https://github.com/mattermost/mattermost/commit/5072bbf689a46b3b97b2373f26149f5891396e6b
- https://github.com/mattermost/mattermost/commit/acda1fb5dd46a2f46c76ae67012423c760525eaa
- https://github.com/mattermost/mattermost/commit/f361e7d75a7ab9df5a2106e1ceb919b94b55e41d
- https://github.com/mattermost/mattermost/commit/feb598ed2b7ac3cb78a253b032ad7e4628b0de00
- https://mattermost.com/security-updates
CVE-2025-12421 · published · modified · JSON