Vulnerabilities > CVE-2025-27933 - Incorrect Authorization vulnerability in Mattermost Server

CVSS 4.3 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

LOW

Confidentiality impact

NONE

Integrity impact

LOW

Availability impact

NONE

network

low complexity

mattermost

CWE-863

NVD

Published: 2025-03-21

Updated: 2025-03-27

Summary

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public

Vulnerable Configurations

Part	Description	Count
Application	Mattermost Mattermost Mattermost Server 10.3.0 Mattermost Mattermost Server 10.3.1 Mattermost Mattermost Server 10.3.2 Mattermost Mattermost Server 10.3.3 Mattermost Mattermost Server 10.4.0 Mattermost Mattermost Server 10.4.1 Mattermost Mattermost Server 10.4.2 Mattermost Mattermost Server 9.11.0 Mattermost Mattermost Server 9.11.1 Mattermost Mattermost Server 9.11.2 Mattermost Mattermost Server 9.11.3 Mattermost Mattermost Server 9.11.4 Mattermost Mattermost Server 9.11.5 Mattermost Mattermost Server 9.11.6 Mattermost Mattermost Server 9.11.7 Mattermost Mattermost Server 9.11.8	41

Common Weakness Enumeration (CWE)

CWE-863 - Incorrect Authorization

References

https://mattermost.com/security-updates