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CVE-2025-64521— authentik deactivated service accounts can authenticate to OAuth

Quick assessment

Affected
goauthentik authentik
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

authentik是authentik开源的一个开源身份提供应用程序。 authentik 2025.8.5之前版本和2025.10.2之前版本存在安全漏洞，该漏洞源于服务账户在停用后仍可进行身份验证，可能导致未经授权的访问。

CVSS 4.8 · Medium EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2025-64521

Vulnerability Information
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Vulnerability Title
authentik deactivated service accounts can authenticate to OAuth
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选名称进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
authentik 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
authentik是authentik开源的一个开源身份提供应用程序。 authentik 2025.8.5之前版本和2025.10.2之前版本存在安全漏洞，该漏洞源于服务账户在停用后仍可进行身份验证，可能导致未经授权的访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
goauthentik authentik < 2025.10.2 -

II. Public POCs for CVE-2025-64521

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III. Intelligence Information for CVE-2025-64521

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IV. Related Vulnerabilities

Same product: authentik
Same vendor: goauthentik
Same weakness: CWE-289

V. Comments for CVE-2025-64521

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