CVE-2024-51752 in authkit-nextjs
Summary
by MITRE • 11/05/2024
The AuthKit library for Next.js provides convenient helpers for authentication and session management using WorkOS & AuthKit with Next.js. In affected versions refresh tokens are logged to the console when the disabled by default `debug` flag, is enabled. This issue has been patched in version 0.13.2 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
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Analysis
by VulDB Data Team • 09/10/2025
The vulnerability identified as CVE-2024-51752 affects the AuthKit library for Next.js, a popular authentication and session management solution that integrates with WorkOS and AuthKit. This library serves as a critical component in Next.js applications that require secure user authentication mechanisms, making it a prime target for attackers seeking to compromise user sessions and access sensitive application data. The issue stems from improper handling of sensitive information during debugging operations, creating a potential security risk that could expose authentication tokens to unauthorized parties.
The technical flaw resides in the library's implementation of the debug functionality, which is disabled by default but can be enabled by developers. When the debug flag is activated, the system logs refresh tokens to the console output, creating an information disclosure vulnerability that violates fundamental security principles. This behavior represents a classic case of sensitive data exposure through improper logging practices, where authentication credentials are inadvertently written to stdout or console output streams. The vulnerability is classified under CWE-209, which addresses information exposure through an error message, and more specifically aligns with CWE-312, which deals with the exposure of sensitive information through logging. The flaw demonstrates poor security hygiene in application development, where sensitive authentication data flows through debugging mechanisms without proper sanitization or security controls.
The operational impact of this vulnerability extends beyond simple information disclosure, as refresh tokens represent highly sensitive credentials that can be exploited to maintain persistent access to user accounts. When attackers gain access to these tokens through console output, they can potentially impersonate users, access restricted resources, and perform unauthorized actions within the application. This threat vector is particularly concerning in production environments where debugging might be enabled for troubleshooting purposes, or where developers might inadvertently leave debug flags active during development phases. The vulnerability directly impacts the principle of least privilege and can lead to privilege escalation attacks, where attackers leverage stolen refresh tokens to gain elevated access rights. From an attack perspective, this issue maps to the MITRE ATT&CK technique T1566, which covers credential harvesting through social engineering and information gathering, and could contribute to T1078, which deals with valid accounts and legitimate credentials.
The security implications of this vulnerability are significant for organizations relying on the AuthKit library, as it creates an attack surface that can be exploited without requiring sophisticated techniques or extensive reconnaissance. The fact that no known workarounds exist means that organizations must immediately upgrade to the patched version 0.13.2 to mitigate the risk. This vulnerability underscores the critical importance of secure coding practices, particularly in authentication libraries where sensitive data handling is paramount. Organizations should implement comprehensive monitoring of console output and logging mechanisms to detect potential information disclosure incidents. The vulnerability also highlights the necessity of thorough security testing during development cycles, including review of debug functionality and logging practices. Additionally, security teams should conduct regular audits of third-party libraries to ensure they are using patched versions and that their security configurations align with organizational security policies.
The remediation approach for this vulnerability requires immediate action from all users of the affected AuthKit library, with version 0.13.2 providing the necessary patch to address the console logging issue. Organizations should establish processes to regularly update their dependencies and maintain an inventory of all third-party libraries in use. Security teams should implement automated scanning tools that can detect vulnerable library versions and alert administrators to potential exposure risks. The incident also reinforces the importance of security awareness training for development teams, emphasizing that debug functionality should never be enabled in production environments and that sensitive data handling practices must be strictly enforced throughout the software development lifecycle. This vulnerability serves as a reminder that even seemingly minor implementation details in authentication systems can create significant security risks, requiring continuous vigilance and proactive security measures to protect user accounts and sensitive application data.