CVE-2026-23645

MEDIUM
2026-01-16 [email protected] GHSA-pcjq-j3mq-jv5j
6.1
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Jan 30, 2026 - 19:32 vuln.today
Public exploit code
Patch Released
Jan 30, 2026 - 19:32 nvd
Patch available
CVE Published
Jan 16, 2026 - 20:15 nvd
MEDIUM 6.1

Tags

XSS Siyuan Suse

Description

SiYuan is self-hosted, open source personal knowledge management software. Prior to 3.5.4-dev2, a Stored Cross-Site Scripting (XSS) vulnerability exists in SiYuan Note. The application does not sanitize uploaded SVG files. If a user uploads and views a malicious SVG file (e.g., imported from an untrusted source), arbitrary JavaScript code is executed in the context of their authenticated session. This vulnerability is fixed in 3.5.4-dev2.

Analysis

SiYuan prior to version 3.5.4-dev2 fails to sanitize SVG file uploads, allowing authenticated attackers to embed malicious JavaScript that executes when other users view the files. Public exploit code exists for this stored XSS vulnerability, which can compromise user sessions and access sensitive knowledge management data. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

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Priority Score

51
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: +20

Vendor Status

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CVE-2026-23645 vulnerability details – vuln.today
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