CVE-2025-68948

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 v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f7ph-rc3w-qp28	Exploit Vendor Advisory
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f7ph-rc3w-qp28	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:*

History

02 Jan 2026, 19:30

Type	Values Removed	Values Added
References	~~() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f7ph-rc3w-qp28 -~~	() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f7ph-rc3w-qp28 - Exploit, Vendor Advisory
CWE		CWE-798
First Time		B3log B3log siyuan
CPE		cpe:2.3:a:b3log:siyuan::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.1

29 Dec 2025, 17:15

Type	Values Removed	Values Added
References	~~() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f7ph-rc3w-qp28 -~~	() https://github.com/siyuan-note/siyuan/security/advisories/GHSA-f7ph-rc3w-qp28 -

27 Dec 2025, 01:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-27 01:15

Updated : 2026-01-02 19:30

NVD link : CVE-2025-68948

Mitre link : CVE-2025-68948

CVE.ORG link : CVE-2025-68948

JSON object : View

Products Affected

b3log

siyuan

CWE

CWE-321

Use of Hard-coded Cryptographic Key

CWE-798

Use of Hard-coded Credentials

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