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Mattermost Incorrect Authorization vulnerability

Moderate severity GitHub Reviewed Published Jun 30, 2025 to the GitHub Advisory Database • Updated Jun 30, 2025

Package

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

Affected versions

< 0.0.0-20250513065225-4ae5d647fb88

Patched versions

0.0.0-20250513065225-4ae5d647fb88
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250513065225-4ae5d647fb88
>= 9.11.0, < 9.11.16
>= 10.5.0, < 10.5.6
>= 10.6.0, < 10.6.6
>= 10.7.0, < 10.7.3
>= 10.8.0, < 10.8.1
8.0.0-20250513065225-4ae5d647fb88
9.11.16
10.5.6
10.6.6
10.7.3
10.8.1

Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly enforce channel member management permissions when adding participants to playbook runs. This allows authenticated users with member-level permissions to bypass system admin restrictions and add or remove users to/from private channels via the playbook run participants feature, even when the 'Manage Members' permission has been explicitly removed. This can lead to unauthorized access to sensitive channel content and allow guest users to gain channel management privileges.

References

Published by the National Vulnerability Database Jun 30, 2025
Published to the GitHub Advisory Database Jun 30, 2025
Reviewed Jun 30, 2025
Last updated Jun 30, 2025

Severity

Moderate

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
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

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:U/C:L/I:L/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(5th percentile)

Weaknesses

CVE ID

CVE-2025-46702

GHSA ID

GHSA-v8fr-vxmw-6mf6

Source code

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