CVE-2025-6227

LOW

Mattermost <10.5.7, <9.11.16 - Info Disclosure

Title source: llm

Description

Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API.

References (1)

[Vendor Advisory] https://mattermost.com/security-updates

Scores

CVSS v3 2.2

EPSS 0.0003

EPSS Percentile 8.4%

Attack Vector NETWORK

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

Classification

CWE

CWE-522

Status published

Affected Products (3)

mattermost/mattermost_server < 9.11.17

mattermost/mattermost-server < 10.5.8Go

mattermost/mattermost < 8.0.0-20250612074655-8f8612c63783Go

Timeline

Published Jul 18, 2025

Tracked Since Feb 18, 2026