Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

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

Quick assessment

Affected
WSO2 WSO2 Identity Server
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.

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

CVSS 5.3 · Medium EPSS 0.18% · P7

Affected Version Matrix 19

VendorProduct Version RangeStatus
WSO2 Email OTP Authenticator 1.0.18< 1.0.18.7 affected
1.0.24≤ * unaffected
WSO2 WSO2 Carbon Authenticator Library For EmailOTP 4.1.0< 4.1.0.8 affected
4.1.4< 4.1.4.9 affected
4.1.22≤ * unaffected
3.0.5< 3.0.5.8 affected
3.0.24< 3.0.24.6 affected
3.0.26< 3.0.26.16 affected
WSO2 WSO2 Identity Server < 5.10.0 unknown
5.10.0< 5.10.0.379 affected
5.11.0< 5.11.0.426 affected
5.11.0< 5.11.0.431 affected
6.0.0< 6.0.0.253 affected
6.1.0< 6.1.0.254 affected
7.0.0< 7.0.0.131 affected
WSO2 WSO2 Identity Server as Key Manager < 5.10.0 unknown
5.10.0< 5.10.0.267 affected
WSO2 WSO2 Open Banking IAM < 2.0.0 unknown
2.0.0< 2.0.0.318 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2024-0391

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery
Source: CVE Program / CVE List V5
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: 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
响应差异性信息暴露
Source: CVE Program / CVE List V5
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

Vendor Product Affected Versions CPE Subscribe
WSO2 WSO2 Identity Server 5.10.0 ~ 5.10.0.379 -
WSO2 WSO2 Open Banking IAM 2.0.0 ~ 2.0.0.318 -
WSO2 WSO2 Identity Server as Key Manager 5.10.0 ~ 5.10.0.267 -
WSO2 Email OTP Authenticator 1.0.18 ~ 1.0.18.7 -
WSO2 WSO2 Carbon Authenticator Library For EmailOTP 4.1.0 ~ 4.1.0.8 -
WSO2 WSO2 Carbon Authenticator Library For EmailOTP 3.0.5 ~ 3.0.5.8 -

II. Public POCs for CVE-2024-0391

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-0391

请登录查看更多情报信息。

Other References for CVE-2024-0391 (1)

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

CVE-2025-10470 8.6 HIGH Denial-of-Service via Magic Link Authentication in WSO2 Identity Server Allows Service Una
CVE-2025-9973 6.4 MEDIUM Authorization Bypass via Adaptive Authentication in WSO2 Identity Server Allows Cross-Orga
CVE-2025-8325 6.3 MEDIUM Improper Access Control via Gateway API in Multiple WSO2 Products Allows Unauthorized Oper
CVE-2025-8154 5.3 MEDIUM HTTP Header Injection via Webhook API in Multiple WSO2 Products Allows Response Header Man
CVE-2025-10908 Account 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

No comments yet

Leave a comment