CVE-2025-6227

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.

Affected packages (6)

• Go/github.com/mattermost/mattermost-server>= 10.5.0, < 10.5.8
• Go/github.com/mattermost/mattermost-server>= 9.11.0+incompatible, < 9.11.17+incompatible, >= 10.5.0+incompatible, < 10.5.8+incompatible
• Go/github.com/mattermost/mattermost-server/v5from 0
• Go/github.com/mattermost/mattermost-server/v6from 0
• Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250612074655-8f8612c63783
• Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250612074655-8f8612c63783

CVSS scores

References (5)

• ADVISORYhttps://github.com/advisories/GHSA-4fwj-8595-wp25
• ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-6227
• PATCHhttps://github.com/mattermost/mattermost
• WEBhttps://github.com/mattermost/mattermost/commit/fbf105f6ef8f6cd5a89f859f09a2d1216cd81c05
• WEBhttps://mattermost.com/security-updates