# CVE-2025-68621

## Summary

- **CVE ID:** CVE-2025-68621
- **Severity:** HIGH
- **CVSS Score:** 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-208
- **Published:** Feb 6, 2026
- **Last Modified:** Mar 13, 2026

## Description

Trilium Notes is an open-source, cross-platform hierarchical note taking application with focus on building large personal knowledge bases.  Prior to 0.101.0, a critical timing attack vulnerability in Trilium's sync authentication endpoint allows unauthenticated remote attackers to recover HMAC authentication hashes byte-by-byte through statistical timing analysis. This enables complete authentication bypass without password knowledge, granting full read/write access to victim's knowledge base. This vulnerability is fixed in 0.101.0.

## Affected Products

- TriliumNext — Trilium (< 0.101.0)

## References

- [CNA](https://github.com/TriliumNext/Trilium/security/advisories/GHSA-hxf6-58cx-qq3x)
- [CNA](https://github.com/TriliumNext/Trilium/pull/8129)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.53%
- **EPSS Percentile:** 43.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._