What’s Vulnerable › Vulnerabilities

CVE-2025-68621: Trilium Notes has a Timing Attack Vulnerability in /api/login/sync

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-06 · updated 2026-06-17
• Weakness: CWE-208

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: before 0.101.0 — fixed in 0.101.0

How to fix

Upgrade to a fixed version: TriliumNext Trilium 0.101.0. Check the vendor advisory for mitigations.

References

• https://github.com/TriliumNext/Trilium/pull/8129
• https://github.com/TriliumNext/Trilium/security/advisories/GHSA-hxf6-58cx-qq3x

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