What is the CVSS score of CVE-2025-64521?

CVE-2025-64521 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Authentik are affected by CVE-2025-64521?

Organizations using previous authentik should be aware of moderate risk from CVE-2025-64521 rated CVSS 4.8. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2025-64521?

During next maintenance window: Identify affected systems running previous authentik and apply vendor patches when convenient. Vendor patch is available.

Authentik CVE-2025-64521

MEDIUM

Authentication Bypass by Alternate Name (CWE-289)

2025-11-19 security-advisories@github.com

Information Disclosure Authentik Suse

4.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.8 MEDIUM

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

SUSE

MEDIUM

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:23 vuln.today

Patch released

Mar 28, 2026 - 19:23 nvd

Patch available

CVE Published

Nov 19, 2025 - 17:15 nvd

MEDIUM 4.8

DescriptionGitHub Advisory

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.

AnalysisAI

authentik is an open-source Identity Provider. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity.

Technical ContextAI

This vulnerability is classified under CWE-289. 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. Affected products include: Goauthentik Authentik.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.