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Mattermost allows reading arbitrary files

Critical severity GitHub Reviewed Published Feb 24, 2025 to the GitHub Advisory Database • Updated Feb 24, 2025

Package

gomod github.com/mattermost/mattermost/server/v8 (Go)

Affected versions

< 8.0.0-20250122165010-4ed702ccff4e
>= 9.11.0-rc1, < 9.11.8
>= 10.2.0-rc1, < 10.2.3
>= 10.3.0-rc1, < 10.3.3
>= 10.4.0-rc1, < 10.4.2

Patched versions

8.0.0-20250122165010-4ed702ccff4e
9.11.8
10.2.3
10.3.3
10.4.2

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.

References

Published by the National Vulnerability Database Feb 24, 2025
Published to the GitHub Advisory Database Feb 24, 2025
Reviewed Feb 24, 2025
Last updated Feb 24, 2025

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS score

Weaknesses

CVE ID

CVE-2025-20051

GHSA ID

GHSA-v469-7wp6-7cvp

Source code

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