CVE-2025-20051
CRITICAL9.9EPSS 0.25%Mattermost allows reading arbitrary files
Published: 2/24/2025Modified: 2/4/2026
Description
Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards.
Affected packages (5)
- Go/github.com/mattermost/mattermost-server>= 9.11.0-rc1+incompatible, < 9.11.8+incompatible, >= 10.2.0-rc1+incompatible, < 10.2.3+incompatible, >= 10.3.0-rc1+incompatible, < 10.3.3+incompatible, >= 10.4.0-rc1+incompatible, < 10.4.2+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, < 8.0.0-20250122165010-4ed702ccff4e
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250122165010-4ed702ccff4e
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H |
References (6)
- ADVISORYhttps://github.com/advisories/GHSA-v469-7wp6-7cvp
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-20051
- PATCHhttps://github.com/mattermost/mattermost
- WEBhttps://github.com/mattermost/mattermost/commit/4ed702ccff4ec3c9eff832a9b6060f9f4454141d
- WEBhttps://github.com/mattermost/mattermost-plugin-boards/commit/025ce8d363a054473bc002f43f602a4032d38c06
- WEBhttps://mattermost.com/security-updates