CVE-2024-0391 - CVE House
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Status published Medium CVE-2024-0391

Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

WSO2 Identity Server, WSO2 Open Banking IAM, WSO2 Identity Server as Key Manager, Email OTP Authenticator, WSO2 Carbon Authenticator Library For EmailOTP
Vulnerable Versions:
0, 5.10.0, 5.11.0, 6.0.0, 6.1.0, 7.0.0, 2.0.0, 1.0.18, 1.0.24, 4.1.0, 4.1.4, 4.1.22, 3.0.5, 3.0.24, 3.0.26

Timeline

Official Publish: May 11th, 2026
Last Modified: May 11th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weaknesses (CWE)

CWE-204

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.