Improper access control in Trilium Notes allows unauthenticated users to access critical functions, necessitating an immediate update to version 0.102.2.

This vulnerability encompasses improper access control (CWE-284) and missing authentication for critical functions (CWE-306). The vulnerability is remotely exploitable without authentication, allowing attackers to perform actions that should be restricted to authenticated users.

Successful exploitation poses a significant risk to personal knowledge bases stored within the application, as unauthorized users could read, modify, or delete sensitive notes. With a CVSS score of 8.6, this vulnerability represents a major security failure for any organization relying on Trilium for documentation or personal data storage.

Immediate Action: Update Trilium to version 0.102.2 or later to ensure proper authentication controls are enforced.

Proactive Monitoring: Audit application access logs for any unauthorized access attempts or unexpected modifications to notes or configuration settings.

Compensating Controls: If the application must remain exposed, place it behind a secure VPN or an authenticated proxy that enforces strict access control before reaching the application.

Public Exploit Available: Unknown.

The existence of a proof-of-concept combined with the ease of exploitation makes this a high-priority item for remediation. All users of Trilium Notes should apply the patch immediately to prevent unauthorized access to their knowledge bases.