CVE-2026-47129 in NextCRM
Summary
by MITRE • 07/21/2026
NextCRM is open-source customer relationship management (CRM) software. Versions prior to 0.12.0 have a Broken Access Control (BAC) vulnerability in the `activateUser` and `deactivateUser` Next.js Server Actions of NextCRM. The application fails to verify if the requesting user holds the `admin` role. Consequently, any authenticated user (even those with the lowest `member` or `viewer` roles) can arbitrarily activate or deactivate any user account in the system, including the main administrator. Version 0.12.0 fixes the issue.
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Analysis
by VulDB Data Team • 07/21/2026
The vulnerability under discussion represents a critical broken access control flaw within NextCRM software that fundamentally undermines the application's security posture. This weakness exists in the server-side functionality of the platform, specifically within the `activateUser` and `deactivateUser` Next.js Server Actions that handle user account management operations. The vulnerability arises from insufficient authorization checks that should verify administrative privileges before allowing critical user account modifications to be executed.
The technical implementation flaw stems from the absence of proper role-based access control validation within the server actions. When an authenticated user submits a request to activate or deactivate another user account, the system fails to validate whether the requesting user possesses the necessary administrative permissions. This oversight allows any user with valid authentication credentials to perform privilege escalation through unauthorized account management operations. The vulnerability affects all versions prior to 0.12.0 and specifically targets the core authentication and authorization mechanisms that should prevent non-administrative users from modifying other user accounts.
The operational impact of this vulnerability is severe and potentially catastrophic for organizations relying on NextCRM for customer relationship management. An attacker with minimal privileges could exploit this weakness to completely compromise system security by activating malicious user accounts or deactivating legitimate administrators, effectively locking out authorized personnel. This scenario creates a persistent threat vector that allows attackers to maintain long-term access to the system while undermining the integrity of user access controls. The vulnerability essentially provides an arbitrary privilege escalation mechanism that bypasses all intended access restrictions.
The flaw aligns with CWE-285, which defines improper authorization as a weakness where software fails to properly verify that entities have adequate access rights to perform requested operations. From an adversarial perspective, this vulnerability maps directly to ATT&CK technique T1078 which covers valid accounts and privilege escalation through unauthorized access to system resources. The security implications extend beyond simple account manipulation since administrators may be unaware of the compromise until significant damage has occurred. Organizations using vulnerable versions face potential data breaches, unauthorized system modifications, and complete loss of administrative control over their user management systems.
The remediation implemented in version 0.12.0 addresses this vulnerability by introducing proper authorization checks within the affected server actions. The fix requires that any request to activate or deactivate user accounts must first validate the requesting user's administrative privileges before executing the operation. This solution follows established security best practices for implementing role-based access control and demonstrates the importance of validating user permissions at every critical system operation point. Organizations should immediately upgrade to version 0.12.0 or later to eliminate this vulnerability and restore proper access controls within their NextCRM deployments.
This vulnerability highlights the critical importance of implementing defense-in-depth security measures, particularly in server-side operations where unauthorized access can have far-reaching consequences. The fix serves as a reminder that authentication alone is insufficient for protecting system integrity - authorization checks must be rigorously enforced at every point where sensitive operations occur. The incident also underscores the necessity of regular security audits and vulnerability assessments to identify and remediate access control weaknesses before they can be exploited by malicious actors in real-world scenarios.