Mattermost allows reading arbitrary files

CVE-2025-20051 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

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.

Basic information

Type
reviewed
Severity
critical
Advisory on GitHub
Open advisory ↗
Repository advisory
—
Source code
Browse source ↗
Published (advisory)
2025-02-24 09:35:45 UTC
Updated
2025-02-24 18:28:23 UTC
GitHub reviewed
2025-02-24 18:28:21 UTC
NVD published
2025-02-24

EPSS Score

Score Percentile
0.33% 55.86%

CVSS Scores

Base score Version Severity Vector
10.0 3.1 —
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.

Identifiers

Type Value
GHSA GHSA-v469-7wp6-7cvp ↗
CVE CVE-2025-20051 ↗

CWEs

CWE id Name
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected packages (5)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
go github.com/mattermost/mattermost/server/v8 < 8.0.0-20250122165010-4ed702ccff4e 8.0.0-20250122165010-4ed702ccff4e —
go github.com/mattermost/mattermost/server/v8 >= 9.11.0-rc1, < 9.11.8 9.11.8 —
go github.com/mattermost/mattermost/server/v8 >= 10.2.0-rc1, < 10.2.3 10.2.3 —
go github.com/mattermost/mattermost/server/v8 >= 10.3.0-rc1, < 10.3.3 10.3.3 —
go github.com/mattermost/mattermost/server/v8 >= 10.4.0-rc1, < 10.4.2 10.4.2 —

References

cvelogic Threat Intelligence