Description
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.
Published: 2026-10-21
Score: 5.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

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

Tracking

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Advisories

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History

Wed, 21 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Username Enumeration via External User Stores in Multiple WSO2 Products Allows User Account Discovery
First Time appeared Wso2
Wso2 wso2 Api Manager
Wso2 wso2 Carborn Identity Handler
Wso2 wso2 Identity Server
Wso2 wso2 Identity Server As Key Manager
Wso2 wso2 Open Banking Am
Wso2 wso2 Open Banking Iam
Weaknesses CWE-204
CPEs cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_carborn_identity_handler:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_identity_server:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_identity_server_as_key_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_open_banking_am:*:*:*:*:*:*:*:*
cpe:2.3:a:wso2:wso2_open_banking_iam:*:*:*:*:*:*:*:*
Vendors & Products Wso2
Wso2 wso2 Api Manager
Wso2 wso2 Carborn Identity Handler
Wso2 wso2 Identity Server
Wso2 wso2 Identity Server As Key Manager
Wso2 wso2 Open Banking Am
Wso2 wso2 Open Banking Iam
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'}

Subscriptions

Wso2 Wso2 Api Manager Wso2 Carborn Identity Handler Wso2 Identity Server Wso2 Identity Server As Key Manager Wso2 Open Banking Am Wso2 Open Banking Iam
cve-icon MITRE

Status: PUBLISHED

Assigner: WSO2

Published:

Updated: 2026-10-21T13:49:07.839Z

Reserved: 2024-08-05T07:38:19.343Z

Link: CVE-2024-7478

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-21T14:17:06.147

Modified: 2026-10-21T14:17:06.147

Link: CVE-2024-7478

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-204

    Observable Response Discrepancy