# CVE-2025-10470: WSO2 Identity Server denial of service in Magic Link authentication

Source: https://junglewise.ai/threats/cve-2025-10470-wso2-identity-server-denial-of-service-in-magic-link  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-11. Updated: 2026-05-27  
License: CC BY 4.0 with a link back

CVE-2025-10470 · Severity: high · CVSS 8.6 · Published 2026-05-11

WSO2 Identity Server, a platform used for managing user identities and access, contains a flaw in its Magic Link login feature. An attacker can send a large volume of invalid login requests to exhaust the server's memory. This can crash the service, preventing legitimate users from logging into their accounts and disrupting business operations.

Technologies: [Wso2 Identity Server](https://junglewise.ai/threats/technologies/identity-server). Vendors: [Wso2](https://junglewise.ai/threats/vendors/wso2).

## Quick answers

**Is CVE-2025-10470 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-10470 being exploited in the wild.

**How severe is CVE-2025-10470?** High severity, with a CVSS score of 8.6, published 11 May 2026.

**Which products and versions are affected?** Wso2 Identity Server 7.0.0, 7.0.0 before update 121.

**Is there a fix for CVE-2025-10470?** 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-2025-10470 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-10470?** Check whether you run Wso2 Identity Server at an affected version. 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

A denial-of-service (DoS) vulnerability exists in the Magic Link authenticator of WSO2 Identity Server due to uncontrolled resource consumption (CWE-400). The authentication flow accepts multiple invalid requests without sufficient rate limiting or resource management, which leads to a steady increase in memory usage. An unauthenticated remote attacker can exploit this by repeatedly sending malformed or invalid authentication attempts, eventually exhausting available system memory and causing the service to become unavailable. The vulnerability is specific to deployments utilizing the Magic Link feature and has been addressed in WSO2 Identity Server 7.0.0 update level 121.

## Affected products

- WSO2 Identity Server 7.0.0 before update 121

## Timeline

- 2026-01-26: advisory: Initial advisory published by WSO2
- 2026-05-11: disclosed: CVE published to NVD

## References

- [https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4469/](https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4469/)

## Related threats

- [WSO2 Identity Server privilege escalation via client credentials grant type](https://junglewise.ai/threats/cve-2025-11229-the-system-fails-to-properly-enforce-scope-authorization-when-the)
- [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)
- [WSO2 Access token issuance without IDP status validation](https://junglewise.ai/threats/cve-2025-1397-when-utilizing-jwt-bearer-or-saml2-bearer-grant-types-the-system)
- [WSO2 products sensitive information disclosure in Event Publisher logs](https://junglewise.ai/threats/cve-2026-18800-when-an-event-publisher-output-adapter-is-configured-with)
- [WSO2 Identity Server content-type validation bypass](https://junglewise.ai/threats/cve-2025-13647-the-affected-component-fails-to-enforce-expected-validation)