Vulnerability · Published Feb 24, 2025 · Assigned by Mattermost
CVE-2025-20051Arbitrary file read via block duplication in Mattermost Boards
Critical 9.9
In plain English
A critical-severity path traversal in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.6%top 50.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 10.2.3+incompatible, 10.3.3+incompatible, 10.4.2+incompatible, 9.11.8+incompatible | GO-2025-3483 |
| Go | github.com/mattermost/mattermost-server/v5 | no fix listed | GO-2025-3483 |
| Go | github.com/mattermost/mattermost-server/v6 | no fix listed | GO-2025-3483 |
| Go | github.com/mattermost/mattermost/server/v8 | 10.3.3 | GHSA-v469-7wp6-7cvp |
| Go | github.com/mattermost/mattermost/server/v8 | 10.4.2 | GHSA-v469-7wp6-7cvp |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250122165010-4ed702ccff4e | GHSA-v469-7wp6-7cvp |
| Go | github.com/mattermost/mattermost/server/v8 | 8.0.0-20250122165010-4ed702ccff4e | GO-2025-3483 |
| Go | github.com/mattermost/mattermost/server/v8 | 9.11.8 | GHSA-v469-7wp6-7cvp |
| Go | github.com/mattermost/mattermost/server/v8 | 10.2.3 | GHSA-v469-7wp6-7cvp |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 10.4.0 – through 10.4.19.11.0 – through 9.11.710.3.0 – through 10.3.210.2.0 – through 10.2.2 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H