CVE-2025-25207 identifies an uncontrolled resource consumption vulnerability in the Authorino service component of Red Hat Connectivity Link, a zero trust API security authorization service. Authorino allows users with developer persona privileges to configure callbacks that execute HTTP requests after authorization completes. The vulnerability arises because an attacker with developer access can register an excessive number of these callbacks. Since the authentication policy enforcement relies on a single Authorino instance processing all post-authorization callbacks, this leads to resource exhaustion, causing a Denial of Service (DoS) condition. The vulnerability affects version 1.0.1 of Authorino. The CVSS v3.1 score is 5.7 (medium severity), reflecting that the attack vector is adjacent network (AV:A), requires low privileges (PR:L), no user interaction (UI:N), and impacts availability only (A:H) without affecting confidentiality or integrity. Exploitation requires authenticated developer persona access, limiting the attack surface to insiders or compromised developer accounts. No known exploits have been reported in the wild as of the publication date. The vulnerability highlights the risk of insufficient input validation or throttling on the number of callbacks a developer can register, leading to resource exhaustion and service disruption. Organizations relying on Authorino for API authorization should review their developer access controls and callback registration policies to mitigate this risk.

The primary impact of CVE-2025-25207 is a Denial of Service condition in the Authorino authorization service, which can disrupt API authorization workflows. For European organizations, this can lead to unavailability of critical API services protected by Red Hat Connectivity Link, potentially halting business operations dependent on these APIs. Since Authorino enforces zero trust policies, its failure could delay or block legitimate API requests, affecting service continuity. The vulnerability does not expose sensitive data or allow unauthorized access, but the availability impact can be significant in environments with high API dependency, such as financial services, telecommunications, and public sector digital services. Organizations with multiple developers or automated systems that can register callbacks are at higher risk. The requirement for developer persona access means insider threats or compromised developer credentials could be exploited. Given the widespread use of Red Hat products in Europe, especially in enterprise and government sectors, the disruption could have cascading effects on digital services and compliance with service-level agreements.

To mitigate CVE-2025-25207, organizations should implement strict access controls and monitoring for developer persona accounts to prevent unauthorized or excessive callback registrations. Limiting the number of callbacks a developer can register per service or per time period can prevent resource exhaustion. Implementing rate limiting and input validation on callback registration endpoints is critical. Deploying multiple Authorino instances or load balancing can reduce the impact of resource exhaustion on a single instance. Organizations should monitor Authorino service metrics for unusual spikes in callback executions or resource usage. Applying patches or updates from Red Hat as they become available is essential. If patches are not yet available, temporarily restricting developer persona permissions or disabling callback registration features until a fix is applied can reduce risk. Conducting regular audits of registered callbacks and developer activities will help detect abuse early. Finally, integrating anomaly detection in API authorization workflows can alert on potential DoS attempts.