# CVE-2025-68948: SiYuan is self-hosted, open source personal knowledge management software. In versions 3.5.1 and prior, the SiYuan…

Source: https://junglewise.ai/threats/cve-2025-68948-siyuan-is-self-hosted-open-source-personal-knowledge-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-27  
License: CC BY 4.0 with a link back

CVE-2025-68948 · Severity: high · CVSS 8.1 · Published 2025-12-27

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.

Technologies: [B3log Siyuan](https://junglewise.ai/threats/technologies/b3log-siyuan). Vendors: [B3log](https://junglewise.ai/threats/vendors/b3log).

## Quick answers

**Is CVE-2025-68948 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-68948 being exploited in the wild.

**How severe is CVE-2025-68948?** High severity, with a CVSS score of 8.1, published 27 December 2025.

**Which products and versions are affected?** B3log Siyuan. The advisory does not name versions.

**Is there a fix for CVE-2025-68948?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-68948?** Check whether you run B3log Siyuan. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- B3log Siyuan

## Related threats

- [SiYuan nil pointer dereference in MCP privateCacheMiddleware](https://junglewise.ai/threats/cve-2026-123492-siyuan-before-3-8-9-contains-a-nil-pointer-dereference)
- [GO-2025-4221 - SiYuan: ZipSlip -> Arbitrary File Overwrite -> RCE in github.com/siyuan-note/siyuan/kernel](https://junglewise.ai/threats/cve-2025-67488-siyuan-zipslip-arbitrary-file-overwrite-rce)