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CVE-2023-39522— Username enumeration attack in goauthentik

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。 goauthentik 2023.6.1之前、2023.5.5之前版本存在安全漏洞，该漏洞源于使用具有识别阶段的恢复流程，攻击者利用该漏洞能够确定用户名是否存在。

CVSS 5.3 · Medium EPSS 0.62% · P48
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I. Basic Information for CVE-2023-39522

Vulnerability Information
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Vulnerability Title
Username enumeration attack in goauthentik
Source: CVE Program / CVE List V5
Vulnerability Description
goauthentik is an open-source Identity Provider. In affected versions using a recovery flow with an identification stage an attacker is able to determine if a username exists. Only setups configured with a recovery flow are impacted by this. Anyone with a user account on a system with the recovery flow described above is susceptible to having their username/email revealed as existing. An attacker can easily enumerate and check users' existence using the recovery flow, as a clear message is shown when a user doesn't exist. Depending on configuration this can either be done by username, email, or both. This issue has been addressed in versions 2023.5.6 and 2023.6.2. Users are advised to upgrade. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过差异性导致的信息暴露
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。 goauthentik 2023.6.1之前、2023.5.5之前版本存在安全漏洞，该漏洞源于使用具有识别阶段的恢复流程，攻击者利用该漏洞能够确定用户名是否存在。
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 >= 2023.6.0, < 2023.6.2 -

II. Public POCs for CVE-2023-39522

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III. Intelligence Information for CVE-2023-39522

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Patches & Fixes for CVE-2023-39522 (1)

Vendor Advisories for CVE-2023-39522 (1)

IV. Related Vulnerabilities

Same product: authentik
Same vendor: goauthentik
Same weakness: CWE-203

V. Comments for CVE-2023-39522

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