EUVD-2026-17683
GHSA-c77m-r996-jr3q
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Primary rating from Vendor (github).
CVSS VectorVendor: github
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
SiYuan is a personal knowledge management system. Prior to version 3.6.2, the publish service exposes bookmarked blocks from password-protected documents to unauthenticated visitors. In publish/read-only mode, /api/bookmark/getBookmark filters bookmark results by calling FilterBlocksByPublishAccess(nil, ...). Because the filter treats a nil context as authorized, it skips the publish password check and returns bookmarked blocks from documents configured as Protected. As a result, anyone who can access the publish service can retrieve content from protected documents without providing the required password, as long as at least one block in the document is bookmarked. This issue has been patched in version 3.6.2.
AnalysisAI
Unauthenticated information disclosure in SiYuan personal knowledge management system versions before 3.6.2 allows remote attackers to retrieve confidential content from password-protected documents via the publish service's bookmark API endpoint. The vulnerability bypasses document-level access controls by treating nil authentication contexts as authorized during bookmark filtering, exposing any bookmarked blocks without password verification. CVSS 7.5 (High) with network-based exploitation requiring no privileges or user interaction; no public exploit identified at time of analysis, though the security advisory provides detailed technical disclosure.
Technical ContextAI
SiYuan is an open-source personal knowledge management and note-taking system with a publish/read-only sharing feature. The vulnerability stems from improper access control (CWE-863) in the bookmark retrieval API endpoint. When the publish service processes bookmark requests via /api/bookmark/getBookmark, it invokes FilterBlocksByPublishAccess with a nil context parameter. The filtering logic incorrectly interprets nil contexts as fully authorized sessions, causing it to skip the mandatory publish password validation step for documents marked as Protected. This logic flaw affects the boundary between public and protected content spaces, allowing the bookmark enumeration mechanism to leak blocks from documents that should require password authentication. The issue exists in SiYuan's Go-based backend API layer where context-based authorization decisions are made.
RemediationAI
Vendor-released patch: version 3.6.2. Users should immediately upgrade to SiYuan 3.6.2 or later, available at https://github.com/siyuan-note/siyuan/releases/tag/v3.6.2. The patch corrects the FilterBlocksByPublishAccess function to properly validate authentication contexts before returning bookmarked blocks from password-protected documents. As a temporary workaround until patching, administrators can disable the publish service feature entirely, remove bookmarks from sensitive protected documents, or avoid using password-protected documents in publish mode. No configuration-only mitigation exists that addresses the root cause. Review access logs for unexpected /api/bookmark/getBookmark requests to identify potential exploitation attempts prior to patching.
A SQL injection vulnerability was discovered in Siyuan 3.1.11 in /getHistoryItems. Rated critical severity (CVSS 9.8), t
A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the ids array parameter in /batchGetBlockAttrs. R
A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the id parameter at /getAssetContent. Rated criti
A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the notebook parameter in /searchHistory. Rated c
SiYuan personal knowledge management system prior to 3.5.4 has a stored XSS vulnerability (CVSS 9.6) that allows code ex
Origin-validation bypass in SiYuan Note (open-source personal knowledge management) before 3.7.0 lets any installed Chro
Reflected XSS in SiYuan knowledge management before 3.5.9.
SiYuan knowledge management system prior to 3.5.5 has a path traversal in /api/file/copyFile allowing arbitrary file ope
SiYuan version 3.0.3 allows executing arbitrary commands on the server. Rated critical severity (CVSS 9.0), this vulnera
SQL injection in SiYuan prior to version 3.6.0 allows any authenticated user, including those with read-only access, to
Cross-site scripting (XSS) in SiYuan personal knowledge management system versions 3.6.0-3.6.1 allows remote attackers t
Arbitrary file disclosure in SiYuan personal knowledge management system before 3.7.0 lets an unauthenticated remote att
Same weakness CWE-863 – Incorrect Authorization
View allSame technique Authentication Bypass
View allVendor StatusVendor
SUSE
Severity: Important| Product | Status |
|---|---|
| SUSE Linux Enterprise Server 16.1 | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | Affected |
| openSUSE Leap 15.5 | Affected |
| openSUSE Leap 15.6 | Affected |
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External POC / Exploit Code
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