TI-2025-39911 Aliases CVE-2025-64521 GHSA-xr73-jq5p-ch8r

authentik deactivated service accounts can authenticate to OAuth

LOW 22CWE-289Published 2025-11-19 · Updated 2025-11-19

Key facts

Attack vector: Network
Privileges required: High
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: Low · Low · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00234 14th percentileScored 2026-11-07

Fix Fixed authentik (goauthentik): 2025.10.2, 2025.8.5goauthentik.io (Go): 0.0.0-20251119140106-9dbdfc3f1be0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
goauthentik	authentik	before 2025.10.2; before 2025.8.5	2025.10.2, 2025.8.5	Patch available	CNA
—	goauthentik.io (Go)	before 0.0.0-20251119140106-9dbdfc3f1be0	0.0.0-20251119140106-9dbdfc3f1be0	Patch available	GHSA-xr73-jq5p-ch8r

authentik Vendorgoauthentik Affected before 2025.10.2; before 2025.8.5 Fixed in 2025.10.2, 2025.8.5 Patch available CNA
goauthentik.io (Go) Vendor— Affected before 0.0.0-20251119140106-9dbdfc3f1be0 Fixed in 0.0.0-20251119140106-9dbdfc3f1be0 Patch available GHSA-xr73-jq5p-ch8r

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:goauthentik:authentik::::::::	2025.8.0 to before 2025.8.5; 2025.10.0 to before 2025.10.2	Vulnerable	goauthentik

cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:* Versions 2025.8.0 to before 2025.8.5; 2025.10.0 to before 2025.10.2 Vulnerable ·goauthentik

Remediation

Fix · CNA authentik (goauthentik) Fixed in 2025.10.2, 2025.8.5
Fix · GHSA-xr73-jq5p-ch8r goauthentik.io (Go) Fixed in 0.0.0-20251119140106-9dbdfc3f1be0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-64521
2026-10-03 Alias added: GHSA-xr73-jq5p-ch8r

References

Patch 2

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-64521

Other 1

https://github.com/goauthentik/authentik

TI-2026-36603 authentik: SourceStage bypass via empty POST CVSS 3.1CRITICAL 9.8
TI-2022-07608 authentik vulnerable to Improper Authentication via invitation URL token reuse CVSS 3.1CRITICAL 9.4
TI-2026-36598 authentik: `UserSourceConnection.user` and `GroupSourceConnection.group` are changeable through the API CVSS 3.1HIGH 8.8
TI-2022-22816 authentik allows existing authenticated users to create arbitrary accounts CVSS 3.1MEDIUM 6.4
TI-2024-25628 Insufficient access control for OAuth2 Device Code flow in authentik CVSS 3.1CRITICAL 9.8
TI-2023-24876 authentik potential installation takeover when default admin user is deleted CVSS 3.1CRITICAL 9.8

See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences