CVE-2025-64521
authentik deactivated service accounts can authenticate to OAuth
Description
authentik is an open-source Identity Provider. Prior to versions 2025.8.5 and 2025.10.2, when authenticating with client_id and client_secret to an OAuth provider, authentik creates a service account for the provider. In previous authentik versions, authentication for this account was possible even when the account was deactivated. Other permissions are correctly applied and federation with other providers still take assigned policies correctly into account. authentik versions 2025.8.5 and 2025.10.2 fix this issue. A workaround involves adding a policy to the application that explicitly checks if the service account is still valid, and deny access if not.
How to fix CVE-2025-64521
To remediate CVE-2025-64521, upgrade the affected package to a fixed version below.
- —upgrade to 0.0.0-20251119140106-9dbdfc3f1be0 or later
- —upgrade to 0.0.0-20251119140106-9dbdfc3f1be0 or later
- —no fix listed
Is CVE-2025-64521 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 0.0.0-20251119140106-9dbdfc3f1be0, >= 2000.0.0, < 2025.8.5, >= 2025.9.0, < 2025.10.2
- from 0, < 0.0.0-20251119140106-9dbdfc3f1be0
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N |