CVE-2025-68621
📋 TL;DR
A critical timing attack vulnerability in Trilium Notes allows unauthenticated remote attackers to recover authentication hashes through statistical timing analysis. This enables complete authentication bypass without password knowledge, granting full read/write access to victims' knowledge bases. All users running vulnerable versions of Trilium Notes with sync enabled are affected.
💻 Affected Systems
- Trilium Notes
📦 What is this software?
Trilium by Triliumnotes
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of personal knowledge base with full read/write access, potential data theft, and unauthorized modification of sensitive notes.
Likely Case
Unauthorized access to personal knowledge base, exposure of private information, and potential data manipulation.
If Mitigated
Limited impact if sync is disabled or network access is restricted, though local exploitation may still be possible.
🎯 Exploit Status
Timing attacks require statistical analysis but are well-documented attack vectors. The advisory provides technical details that could facilitate exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.101.0
Vendor Advisory: https://github.com/TriliumNext/Trilium/security/advisories/GHSA-hxf6-58cx-qq3x
Restart Required: Yes
Instructions:
1. Backup your Trilium data
2. Download Trilium 0.101.0 or later from official sources
3. Install the new version
4. Restart Trilium
🔧 Temporary Workarounds
Disable Sync
allDisable the sync feature to prevent remote exploitation of the authentication endpoint.
Edit trilium.ini or config file and set 'syncEnabled' to false
Network Isolation
allRestrict network access to Trilium sync port (default 8080) to trusted networks only.
Configure firewall rules to block external access to Trilium sync port
🧯 If You Can't Patch
- Disable sync functionality completely
- Implement network segmentation to isolate Trilium from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Check Trilium version in Help > About. If version is below 0.101.0, you are vulnerable.Check Version:
Check Help > About in Trilium GUI or examine package version on systemVerify Fix Applied:
Verify version is 0.101.0 or higher in Help > About menu.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts to sync endpoint
- Multiple failed sync authentication requests from same source
- Successful authentication from unexpected IP addresses
Network Indicators:
- High volume of requests to /sync/auth endpoint
- Unusual timing patterns in authentication requests
- Requests from unexpected geographic locations
SIEM Query:
source="trilium" AND (event="authentication" OR endpoint="/sync/auth") AND (status="failed" OR count > threshold)