CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2025-20086
Medium (6.5) in mattermost mattermost server. EPSS 0.4% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 10.0.4, 10.1.4, 10.2.1.
Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
Severity
- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-31)
- CWE
- CWE-1287
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-5m7j-6gc4-ff5g | Go | github.com/mattermost/mattermost/server/v8 | >=10.2.0 <10.2.1 | 10.2.1 |
| GHSA-5m7j-6gc4-ff5g | Go | github.com/mattermost/mattermost/server/v8 | >=10.1.0 <10.1.4 | 10.1.4 |
| GHSA-5m7j-6gc4-ff5g | Go | github.com/mattermost/mattermost/server/v8 | >=10.0.0 <10.0.4 | 10.0.4 |
| GHSA-5m7j-6gc4-ff5g | Go | github.com/mattermost/mattermost/server/v8 | >=9.11.0 <9.11.6 | 9.11.6 |
| GHSA-5m7j-6gc4-ff5g | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20241127161322-25ff7a3779a5 | 8.0.0-20241127161322-25ff7a3779a5 |
| GO-2025-3392 | Go | github.com/mattermost/mattermost-server | >=9.11.0+incompatible <9.11.6+incompatible >=10.0.0+incompatible <10.0.4+incompatible >=10.1.0+incompatible <10.1.4+incompatible >=10.2.0+incompatible <10.2.1+incompatible | 9.11.6+incompatible, 10.0.4+incompatible, 10.1.4+incompatible, 10.2.1+incompatible |
| GO-2025-3392 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-3392 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-3392 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20241127161322-25ff7a3779a5 | 8.0.0-20241127161322-25ff7a3779a5 |