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CVE-2025-57770— ZITADEL user enumeration vulnerability in login UI

Quick assessment

Affected
zitadel zitadel
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.

ZITADEL是瑞士ZITADEL开源的一个 Auth0、Firebase Auth、AWS Cognito 以及为容器和无服务器时代构建的 Keycloak 的现代开源替代方案。 ZITADEL 4.0.0至4.0.2版本、3.0.0至3.3.6版本和2.71.15之前版本存在安全漏洞，该漏洞源于登录界面存在用户名枚举问题。

CVSS 5.3 · Medium EPSS 0.39% · P32

Possible ATT&CK Techniques 1 AI

T1087.004 · Cloud Account
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I. Basic Information for CVE-2025-57770

Vulnerability Information
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Vulnerability Title
ZITADEL user enumeration vulnerability in login UI
Source: CVE Program / CVE List V5
Vulnerability Description
The open-source identity infrastructure software Zitadel allows administrators to disable the user self-registration. Versions 4.0.0 to 4.0.2, 3.0.0 to 3.3.6, and all versions prior to 2.71.15 are vulnerable to a username enumeration issue in the login interface. The login UI includes a security feature, Ignoring unknown usernames, that is intended to prevent username enumeration by returning a generic response for both valid and invalid usernames. This vulnerability allows an unauthenticated attacker to bypass this protection by submitting arbitrary userIDs to the select account page and distinguishing between valid and invalid accounts based on the system's response. For effective exploitation, an attacker needs to iterate through possible userIDs, but the impact can be limited by implementing rate limiting or similar measures. The issue has been patched in versions 4.0.3, 3.4.0, and 2.71.15.
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
ZITADEL 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZITADEL是瑞士ZITADEL开源的一个 Auth0、Firebase Auth、AWS Cognito 以及为容器和无服务器时代构建的 Keycloak 的现代开源替代方案。 ZITADEL 4.0.0至4.0.2版本、3.0.0至3.3.6版本和2.71.15之前版本存在安全漏洞，该漏洞源于登录界面存在用户名枚举问题。
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
zitadel zitadel < 2.71.15 -

II. Public POCs for CVE-2025-57770

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III. Intelligence Information for CVE-2025-57770

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IV. Related Vulnerabilities

Same product: zitadel
Same vendor: zitadel
Same weakness: CWE-203

V. Comments for CVE-2025-57770

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