CVE-2025-9078
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 properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing
- CVSS 3.1
- 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-25)
- CWE
- CWE-328
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9p92-x77w-9fw2 | Go | github.com/mattermost/mattermost-server | >=10.8.0 <10.8.4 | 10.8.4 |
| GHSA-9p92-x77w-9fw2 | Go | github.com/mattermost/mattermost-server | >=10.5.0 <10.5.9 | 10.5.9 |
| GHSA-9p92-x77w-9fw2 | Go | github.com/mattermost/mattermost-server | >=9.11.0 <9.11.18 | 9.11.18 |
| GHSA-9p92-x77w-9fw2 | Go | github.com/mattermost/mattermost-server | >=10.10.0 <10.10.2 | 10.10.2 |
| GHSA-9p92-x77w-9fw2 | Go | github.com/mattermost/mattermost-server | >=10.9.0 <10.9.4 | 10.9.4 |
| GHSA-9p92-x77w-9fw2 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250718075842-cd87e5c87737 | 8.0.0-20250718075842-cd87e5c87737 |
| GO-2025-3959 | Go | github.com/mattermost/mattermost-server | >=9.11.0+incompatible <9.11.18+incompatible >=10.5.0+incompatible <10.5.9+incompatible >=10.8.0+incompatible <10.8.4+incompatible >=10.9.0+incompatible <10.9.4+incompatible >=10.10.0+incompatible <10.10.2+incompatible | 9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.4+incompatible, 10.10.2+incompatible |
| GO-2025-3959 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-3959 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-3959 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250718075842-cd87e5c87737 | 8.0.0-20250718075842-cd87e5c87737 |