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CVE-2024-0391— Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery

CVSS 5.3 · Medium EPSS 0.02% · P7
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I. Basic Information for CVE-2024-0391

Vulnerability Information
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Vulnerability Title
Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery
Source: NVD (National Vulnerability Database)
Vulnerability Description
The check user account lock states feature within the email OTP flow fails to validate user input, allowing an attacker to infer the existence of registered user accounts. The discovery of valid usernames can increase the risk of brute-force and social engineering attacks. Attackers can leverage this information to craft targeted phishing campaigns or other malicious activities aimed at tricking users into divulging sensitive data, potentially damaging the organization's reputation and leading to regulatory non-compliance and financial consequences.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
响应差异性信息暴露
Source: NVD (National Vulnerability Database)
Vulnerability Title
WSO2多款产品 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WSO2 Identity Server（IS）等都是美国WSO2公司的产品。WSO2 Identity Server是一款身份认证服务器。WSO2 Identity Server as Key Manager是一个身份服务器。WSO2 Open Banking IAM是一种用于开放银行（Open Banking）领域的身份和访问管理解决方案。 WSO2多款产品存在安全漏洞，该漏洞源于未能验证用户输入，可能导致攻击者推断已注册用户账户的存在，增加暴力攻击和社会工程攻击风险。以下产品受到影响：WSO2 Id
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

VendorProductAffected VersionsCPESubscribe
WSO2WSO2 Identity Server 5.10.0 ~ 5.10.0.379 -
WSO2WSO2 Open Banking IAM 2.0.0 ~ 2.0.0.318 -
WSO2WSO2 Identity Server as Key Manager 5.10.0 ~ 5.10.0.267 -
WSO2Email OTP Authenticator 1.0.18 ~ 1.0.18.7 -
WSO2WSO2 Carbon Authenticator Library For EmailOTP 4.1.0 ~ 4.1.0.8 -
WSO2WSO2 Carbon Authenticator Library For EmailOTP 3.0.5 ~ 3.0.5.8 -

II. Public POCs for CVE-2024-0391

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III. Intelligence Information for CVE-2024-0391

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Same Patch Batch · WSO2 · 2026-05-11 · 6 CVEs total

CVE-2025-104708.6 HIGHDenial-of-Service via Magic Link Authentication in WSO2 Identity Server Allows Service Una
CVE-2025-99736.4 MEDIUMAuthorization Bypass via Adaptive Authentication in WSO2 Identity Server Allows Cross-Orga
CVE-2025-83256.3 MEDIUMImproper Access Control via Gateway API in Multiple WSO2 Products Allows Unauthorized Oper
CVE-2025-81545.3 MEDIUMHTTP Header Injection via Webhook API in Multiple WSO2 Products Allows Response Header Man
CVE-2025-10908Account Lock Bypass via Magic Link or Pass Key Authentication in WSO2 Identity Server Allo

IV. Related Vulnerabilities

Same product: WSO2 Identity Server
Same vendor: WSO2
Same weakness: CWE-204

V. Comments for CVE-2024-0391

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