CVE-2025-9078
MEDIUM4.3EPSS 0.03%Mattermost makes Use of Weak Hash
Published: 9/15/2025Modified: 9/17/2025
Description
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.
Affected packages (6)
- Go/github.com/mattermost/mattermost-server>= 10.8.0, < 10.8.4
- 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
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250718075842-cd87e5c87737
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250718075842-cd87e5c87737
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
References (8)
- ADVISORYhttps://github.com/advisories/GHSA-9p92-x77w-9fw2
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-9078
- PATCHhttps://github.com/mattermost/mattermost
- WEBhttps://github.com/mattermost/mattermost/commit/356880c8430b77a4a390c89d5a33f6928188d137
- WEBhttps://github.com/mattermost/mattermost/commit/944ad5cdd9876ef61c78c8275906262a4118755a
- WEBhttps://github.com/mattermost/mattermost/commit/a8a4badc130be101e5bc4b7916bbcd2f966c4b79
- WEBhttps://github.com/mattermost/mattermost/commit/cd87e5c877373f109742aa90a3fa136c14774325
- WEBhttps://mattermost.com/security-updates