CVE-2024-0391
Username Enumeration via Email OTP Flow in Multiple WSO2 Products Allows User Account Discovery
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.
INFO
Published Date :
May 11, 2026, 10:16 a.m.
Last Modified :
May 11, 2026, 10:16 a.m.
Remotely Exploit :
Yes !
Source :
ed10eef1-636d-4fbe-9993-6890dfa878f8
Affected Products
The following products are affected by CVE-2024-0391
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | ed10eef1-636d-4fbe-9993-6890dfa878f8 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Validate all user input within the account lock state check.
- Ensure proper error handling for non-existent accounts.
- Implement rate limiting for account status checks.
- Consider randomizing responses for account status.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-0391.
| URL | Resource |
|---|---|
| https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-0391 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-0391
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-0391 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-0391 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by ed10eef1-636d-4fbe-9993-6890dfa878f8
May. 11, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-204 Added Reference https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3115/