# CVE-2024-7478: WSO2 username enumeration in external user store authentication

Source: https://junglewise.ai/threats/cve-2024-7478-when-a-wso2-product-is-configured-to-use-an-external-user-store  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-21. Updated: 2026-10-21  
License: CC BY 4.0 with a link back

CVE-2024-7478 · Severity: medium · CVSS 5.8 · Published 2026-10-21

WSO2 identity and access management products fail to properly mask authentication responses when configured with an external user store, allowing attackers to enumerate valid usernames through repeated login attempts. This information can be weaponized for targeted brute-force attacks, phishing campaigns, and social engineering, potentially leading to unauthorized account access and reputational damage.

Technologies: [Wso2 API Manager](https://junglewise.ai/threats/technologies/api-manager), [Wso2 Enterprise Integrator](https://junglewise.ai/threats/technologies/enterprise-integrator), [Wso2 Identity Server](https://junglewise.ai/threats/technologies/identity-server). Vendors: [Wso2](https://junglewise.ai/threats/vendors/wso2).

## Quick answers

**Is CVE-2024-7478 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2024-7478 being exploited in the wild.

**How severe is CVE-2024-7478?** Medium severity, with a CVSS score of 5.8, published 21 October 2026.

**Which products and versions are affected?** WSO2 Identity Server; WSO2 API Manager; WSO2 Enterprise Integrator.

**Is there a fix for CVE-2024-7478?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2024-7478 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2024-7478?** Check whether you run Wso2 API Manager, Wso2 Enterprise Integrator or Wso2 Identity Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a username enumeration flaw in WSO2 products configured with external user stores. During authentication attempts, the system returns distinct responses that leak information about whether a given username exists, allowing attackers to probe the user store and build a valid user list. An unauthenticated remote attacker can exploit this over the network without special privileges.

## Affected products

- WSO2 Identity Server
- WSO2 API Manager
- WSO2 Enterprise Integrator

## Timeline

- 2026-10-21: disclosed

## References

- [https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3606/](https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2024-3606/)

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- [WSO2 Identity Server privilege escalation via shared database](https://junglewise.ai/threats/cve-2026-4052-this-issue-only-impacts-deployments-where-wso2-identity-server-is)
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