CVE-2025-7106 is an authorization bypass vulnerability affecting the danny-avila/librechat project, a software product that implements role-based access control (RBAC) for managing user permissions. The root cause lies in the improper access control logic within the `checkAccess` function located in `api/server/middleware/roles/access.js`. This function uses the JavaScript `permissions.some()` method to validate whether a user has the required permissions. However, the use of `some()` is flawed because it returns true if any one of the required permissions is present, rather than requiring all permissions to be present. For example, when checking for permissions `['USE', 'CREATE']`, the function incorrectly grants access if the user has only the `USE` permission, even if `CREATE` is explicitly set to false. This logic flaw allows users with a 'USER' role, who should not have creation rights (`CREATE: false`), to create agents or perform other privileged actions. The vulnerability extends beyond the `CREATE` permission to other permission checks such as `PROMPTS`, indicating a systemic issue in the permission validation mechanism. The vulnerability affects all versions of danny-avila/librechat prior to the fix, although specific affected versions are unspecified. The CVSS v3.0 score is 5.3 (medium severity), reflecting a network exploitable vulnerability with low attack complexity, no privileges required, no user interaction, and limited impact on integrity but no impact on confidentiality or availability. No known exploits are currently reported in the wild. The vulnerability is classified under CWE-284 (Improper Access Control), highlighting the failure to enforce correct authorization checks. This flaw can lead to unauthorized privilege escalation within the application, potentially allowing unauthorized users to perform restricted actions, undermining the security model of the software.

For European organizations using danny-avila/librechat, this vulnerability poses a risk of unauthorized privilege escalation within the application, potentially allowing users with limited roles to perform administrative or creation actions they are not authorized to execute. This can lead to unauthorized data manipulation, creation of rogue agents, or misuse of application features that rely on strict permission enforcement. While the vulnerability does not directly impact confidentiality or availability, the integrity of data and operations within the affected system can be compromised. Organizations relying on librechat for sensitive communications or automated agent management could face operational disruptions or data integrity issues. Given the medium severity and the lack of required privileges or user interaction for exploitation, attackers or malicious insiders could exploit this vulnerability remotely with relative ease. This risk is heightened in environments where librechat is integrated into critical workflows or where user roles are broadly assigned without strict oversight. The absence of known exploits in the wild suggests limited current active threat, but the vulnerability should be addressed promptly to prevent potential abuse. Compliance with European data protection regulations (e.g., GDPR) may be impacted if unauthorized actions lead to data integrity issues or unauthorized processing of personal data.

To mitigate CVE-2025-7106, organizations should immediately update to the fixed version of danny-avila/librechat once available, ensuring the access control logic correctly requires all specified permissions rather than any single permission. In the interim, a code review and patch can be applied to the `checkAccess` function to replace the use of `permissions.some()` with a method that verifies all required permissions are present, such as `permissions.every()`. Additionally, organizations should audit existing user roles and permissions to identify and restrict any users who may have been granted excessive privileges due to this flaw. Implementing additional monitoring and alerting on permission changes and agent creation activities can help detect exploitation attempts. Employing defense-in-depth strategies, such as network segmentation and limiting access to the librechat management interfaces, can reduce exposure. Finally, conducting security awareness training for administrators and users about the risks of improper access control and the importance of role-based permissions can help prevent misuse.