How severe is CVE-2025-64521?

CVE-2025-64521 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-64521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-64521?

CVE-2025-64521 affects Goauthentik Authentik. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-64521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-64521 have an EU (EUVD) identifier?

Yes. CVE-2025-64521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198186.

When was CVE-2025-64521 published?

CVE-2025-64521 was published on 2025-11-19 and last updated on 2026-06-17.

CVE-2025-64521

CVE-2025-64521 is a medium-severity vulnerability in Goauthentik Authentik with a CVSS 3.x base score of 4.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-289.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198186
Weakness: CWE-289
Affected product: Goauthentik Authentik
Published: 2025-11-19
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-64521?: 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 severe is CVE-2025-64521?: CVE-2025-64521 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-64521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-64521?: CVE-2025-64521 affects Goauthentik Authentik. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-64521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-64521 have an EU (EUVD) identifier?: Yes. CVE-2025-64521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198186.
When was CVE-2025-64521 published?: CVE-2025-64521 was published on 2025-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:goauthentik:authentik:*:*:*:*:*:*:*:*

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