CVE-2025-58075 HIGH

CVE-2025-58075: Arbitrary Mattermost Team can be joined by manipulating the SAML RelayState

Vendor Mattermost
Product Mattermost
Weakness CWE-862 · Missing authorization
Published October 16, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

8.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState

Key dates

02Disclosure timeline

October 16, 2025 CVE published
February 26, 2026 Record updated