---
id: CVE-2024-7478
title: >-
  Username Enumeration via External User Stores in Multiple WSO2 Products Allows
  User Account Discovery
summary: >-
  When a WSO2 product is configured to use an external user store, the system
  fails to adequately obscure the existence or validity of usernames during
  authentication attempts. This oversight allows an attacker to repeatedly query
  the auth…
severity: medium
cvss: 5.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-204
vendor: WSO2
product: WSO2 API Manager
affected:
  - api_manager >= 3.1.0 < 3.1.0.310
  - api_manager >= 3.2.0 < 3.2.0.401
  - api_manager >= 3.2.1 < 3.2.1.26
  - api_manager >= 4.0.0 < 4.0.0.318
  - api_manager >= 4.1.0 < 4.1.0.180
  - api_manager >= 4.2.0 < 4.2.0.119
  - api_manager >= 4.3.0 < 4.3.0.30
  - identity_server_as_key_manager >= 5.10.0 < 5.10.0.320
  - identity_server >= 5.10.0 < 5.10.0.326
  - identity_server >= 6.0.0 < 6.0.0.214
  - identity_server >= 6.1.0 < 6.1.0.198
  - identity_server >= 7.0.0 < 7.0.0.67
  - open_banking_iam >= 2.0.0 < 2.0.0.371
  - open_banking_am >= 2.0.0 < 2.0.0.351
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.4.0 < 1.4.0.15
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.4.0 < 1.4.0.16
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.4.11 < 1.4.11.14
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.4.37 < 1.4.37.1
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.6.1 < 1.6.1.5
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.7.1 < 1.7.1.1
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.8.6 < 1.8.6.5
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.8.14 < 1.8.14.1
  - org.wso2.carbon.identity.handler.event.account.lock >= 1.9.2 < 1.9.2.4
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T13:49:07.839Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2024-7478'
references:
  - url: >-
      https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3606/
tags:
  - cve.org
ingestedAt: '2026-10-21T13:57:01.108Z'
---

## Overview

When a WSO2 product is configured to use an external user store, the system fails to adequately obscure the existence or validity of usernames during authentication attempts. This oversight allows an attacker to repeatedly query the authentication mechanism with different username guesses, enabling the enumeration of valid usernames present in the external user store.

The discovery of valid usernames can increase the risk of targeted brute-force attacks, social engineering, and information leakage. Attackers can leverage this information to craft more convincing phishing campaigns or other social engineering tactics to trick users into revealing sensitive data. The presence of username enumeration could also negatively impact an organization's reputation, leading to loss of customer trust, regulatory non-compliance, and potential legal and financial repercussions.

## Affected

- `api_manager >= 3.1.0 < 3.1.0.310`
- `api_manager >= 3.2.0 < 3.2.0.401`
- `api_manager >= 3.2.1 < 3.2.1.26`
- `api_manager >= 4.0.0 < 4.0.0.318`
- `api_manager >= 4.1.0 < 4.1.0.180`
- `api_manager >= 4.2.0 < 4.2.0.119`
- `api_manager >= 4.3.0 < 4.3.0.30`
- `identity_server_as_key_manager >= 5.10.0 < 5.10.0.320`
- `identity_server >= 5.10.0 < 5.10.0.326`
- `identity_server >= 6.0.0 < 6.0.0.214`
- `identity_server >= 6.1.0 < 6.1.0.198`
- `identity_server >= 7.0.0 < 7.0.0.67`
- `open_banking_iam >= 2.0.0 < 2.0.0.371`
- `open_banking_am >= 2.0.0 < 2.0.0.351`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.4.0 < 1.4.0.15`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.4.0 < 1.4.0.16`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.4.11 < 1.4.11.14`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.4.37 < 1.4.37.1`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.6.1 < 1.6.1.5`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.7.1 < 1.7.1.1`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.8.6 < 1.8.6.5`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.8.14 < 1.8.14.1`
- `org.wso2.carbon.identity.handler.event.account.lock >= 1.9.2 < 1.9.2.4`

## Remediation

Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3606/#solution