Description
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to invalidate OAuth refresh tokens upon user account deactivation, which allows a deactivated user or an attacker in possession of a valid refresh token to obtain new functional access tokens via the OAuth refresh token grant endpoint.. Mattermost Advisory ID: MMSA-2026-00680
CVSS 5.9EPSS 0.174%Risk 0.6
View source- Published
- 2026-07-13 09:16:25
- Affected versions
- <= 11.7.2, <= 11.6.4, <= 10.11.19
- Type
- Web application
- Vector
- CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N