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CVE-2025-68621

Triliumnotes Trilium authentication bypass

7.4 HIGHPublic exploitEPSS 0.57%
  1. Published6 Feb 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Triliumnotes Trilium< 0.101.0

Remediation

Fixed in
Triliumnotes Trilium≥ 0.101.0

References

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Frequently asked

Is CVE-2025-68621 being actively exploited?

CVE-2025-68621 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.57%.

How severe is CVE-2025-68621?

CVE-2025-68621 has a CVSS 3.1 base score of 7.4, rated high. EPSS estimates a 0.57% probability of exploitation.

Which products are affected by CVE-2025-68621?

Affected products include Triliumnotes Trilium.

How do I fix CVE-2025-68621?

Upgrade affected software to a fixed version, for example Triliumnotes Trilium 0.101.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-68621 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.