What is the CVSS score of CVE-2025-68621?

CVE-2025-68621 has a CVSS 3.1 base score of 7.4 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 0.1%.

Which versions of Trilium are affected by CVE-2025-68621?

CVE-2025-68621 affects Trilium Notes, an open-source note-taking application, with a HIGH severity rating (CVSS 7.4) and publicly available exploits.. A patch is available.

Is there a public PoC exploit available for CVE-2025-68621?

Yes, a public proof-of-concept exploit is available for CVE-2025-68621. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-68621?

Within 24 hours: Identify all instances of Trilium Notes in use across the organization and assess exposure (internal only vs. internet-facing). Within 7 days: Apply the available vendor patch to all affected instances and validate successful deployment. Within 30 days: Conduct a security audit of patched systems and review access logs for signs of exploitation.

Trilium CVE-2025-68621

HIGH

Observable Timing Discrepancy (CWE-208)

2026-02-06 security-advisories@github.com

Authentication Bypass Trilium

7.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.4 HIGH

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 24, 2026 - 15:14 vuln.today

Public exploit code

Patch released

Feb 24, 2026 - 15:14 nvd

Patch available

CVE Published

Feb 06, 2026 - 22:16 nvd

HIGH 7.4

DescriptionGitHub Advisory

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.

AnalysisAI

Trilium Notes is an open-source, cross-platform hierarchical note taking application with focus on building large personal knowledge bases. [CVSS 7.4 HIGH]

Technical ContextAI

Affects Trilium. 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.