Description
Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4 fail to verify whether a guest account is deactivated before creating a session in the magic-link token login path, which allows a deactivated guest user to obtain a fully functional session via a magic-link token issued prior to deactivation.. Mattermost Advisory ID: MMSA-2026-00681
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 11.7.0 – ≤ 11.7.2, 11.6.0 – ≤ 11.6.4 | 11.8.0 |
Advisories 1
- WID-SEC-2026-2107 Mattermost Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 27, 2026
References
- MMSA-2026-00681 vendor-advisory