The Magic Link authentication flow accepts multiple invalid authentication requests without adequate rate limiting or resource control, leading to unc...
Description
The Magic Link authentication flow accepts multiple invalid authentication requests without adequate rate limiting or resource control, leading to uncontrolled memory usage growth
AI Analyst Comment
Remediation
Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs.
---METADATA---
VENDOR: WSO2
PRODUCT: WSO2 Identity Server / Carbon MagicLink Authenticator Module
AFFECTED_VERSIONS: Identity Server 7.0.0 (up to 7.0.0.121), MagicLink Authenticator 1.1.22 (up to 1.1.22.3)
CONFIDENCE: high
MISSING: none
---END_METADATA---
Description Summary:
The WSO2 Magic Link authentication flow is vulnerable to a denial-of-service condition due to insufficient rate limiting on invalid authentication requests, leading to uncontrolled memory consumption.
Executive Summary:
A critical resource consumption vulnerability in the WSO2 Magic Link authentication flow allows unauthenticated attackers to trigger a denial-of-service by exhausting system memory.
Vulnerability Details
CVE-ID: CVE-2025-10470
Affected Software: WSO2 Identity Server and Carbon MagicLink Authenticator Module
Affected Versions: Identity Server 7.0.0 (up to 7.0.0.121); MagicLink Authenticator 1.1.22 (up to 1.1.22.3)
Vulnerability: The application lacks adequate rate limiting (CWE-400) for incoming authentication requests. An unauthenticated attacker can submit a high volume of invalid requests, causing the system to consume excessive memory and ultimately leading to service unavailability.
Business Impact
Rated at CVSS 8.6, this vulnerability poses a significant risk to the availability of identity services. A successful denial-of-service attack could prevent legitimate users from authenticating, effectively halting business operations that rely on the affected WSO2 infrastructure.
Remediation Plan
Immediate Action: Upgrade the WSO2 Carbon MagicLink Authenticator Module to version 1.1.31 or higher and follow the specific guidance provided in the vendor security advisory.
Proactive Monitoring: Monitor system memory usage and authentication request rates to identify spikes indicative of a potential denial-of-service attack.
Compensating Controls: Implement rate limiting at the network or API gateway layer to throttle incoming authentication requests before they reach the vulnerable service.
Exploitation Status
Public Exploit Available: Unknown.
Analyst Notes: As of May 29, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The vulnerability is highly automatable, making it an attractive target for service disruption.
Analyst Recommendation
The severity of this vulnerability necessitates prompt action to stabilize the identity environment. Administrators should apply the vendor-provided updates immediately and consider implementing temporary rate-limiting controls if an immediate upgrade is not feasible.