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CVE-2025-68948

B3log Siyuan hard-coded credentials

8.1 HIGHPublic exploitEPSS 0.22%
  1. Published27 Dec 2025

Description

SiYuan is self-hosted, open source personal knowledge management software. In versions 3.5.1 and prior, the SiYuan Note application utilizes a hardcoded cryptographic secret for its session store. This unsafe practice renders the session encryption ineffective. Since the sensitive AccessAuthCode is stored within the session cookie, an attacker who intercepts or obtains a user's encrypted session cookie (e.g., via session hijacking) can locally decrypt it using the public key. Once decrypted, the attacker can retrieve the AccessAuthCode in plain text and use it to authenticate or take over the session.

CVSS 3.1 breakdown

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

Affected products

B3log Siyuan< 3.5.2

Remediation

Fixed in
B3log Siyuan≥ 3.5.2

References

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Frequently asked

Is CVE-2025-68948 being actively exploited?

CVE-2025-68948 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.22%.

How severe is CVE-2025-68948?

CVE-2025-68948 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.22% probability of exploitation.

Which products are affected by CVE-2025-68948?

Affected products include B3log Siyuan.

How do I fix CVE-2025-68948?

Upgrade affected software to a fixed version, for example B3log Siyuan 3.5.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-68948 against the real software inventory on every managed device, as each hourly inventory arrives. 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.