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Global malware Financial Services, Cryptocurrency CRITICAL 50m Global general Financial Services and E-commerce MEDIUM 52m Global data_breach Social Media and Communications CRITICAL 1h Global general Cybersecurity Operations HIGH 1h Global phishing Technology and Consumer Services HIGH 1h Global data_breach Multiple sectors HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global apt Financial Services, Government HIGH 2h Global insider Cross-sector CRITICAL 3h Global malware Financial Services, Cryptocurrency CRITICAL 50m Global general Financial Services and E-commerce MEDIUM 52m Global data_breach Social Media and Communications CRITICAL 1h Global general Cybersecurity Operations HIGH 1h Global phishing Technology and Consumer Services HIGH 1h Global data_breach Multiple sectors HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global apt Financial Services, Government HIGH 2h Global insider Cross-sector CRITICAL 3h Global malware Financial Services, Cryptocurrency CRITICAL 50m Global general Financial Services and E-commerce MEDIUM 52m Global data_breach Social Media and Communications CRITICAL 1h Global general Cybersecurity Operations HIGH 1h Global phishing Technology and Consumer Services HIGH 1h Global data_breach Multiple sectors HIGH 2h Global vulnerability Government and Critical Infrastructure CRITICAL 2h Global vulnerability Multiple sectors CRITICAL 2h Global apt Financial Services, Government HIGH 2h Global insider Cross-sector CRITICAL 3h
Vulnerabilities

CVE-2026-25539

Critical ⚡ Exploit Available
CVE-2026-25539: Path Traversal Vulnerability in SiYuan Knowledge Management System Leading to Remote Code Execution
CWE-22 — Weakness Type
Published: Feb 4, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
9.1
🔗 NVD Official
📄 Description (English)

SiYuan is a personal knowledge management system. Prior to version 3.5.5, the /api/file/copyFile endpoint does not validate the dest parameter, allowing authenticated users to write files to arbitrary locations on the filesystem. This can lead to Remote Code Execution (RCE) by writing to sensitive locations such as cron jobs, SSH authorized_keys, or shell configuration files. This issue has been patched in version 3.5.5.

🤖 AI Executive Summary

SiYuan knowledge management system versions before 3.5.5 contain a path traversal vulnerability in the /api/file/copyFile endpoint that allows authenticated users to write files to arbitrary filesystem locations. This can enable Remote Code Execution through manipulation of sensitive system files like cron jobs or SSH configurations.

📄 Description (Arabic)

ثغرة اجتياز المسار في نقطة نهاية /api/file/copyFile في SiYuan تسمح للمستخدمين المصرحين بتجاوز التحقق من صحة معامل الوجهة وكتابة الملفات إلى أي موقع في نظام الملفات. يمكن للمهاجمين استغلال هذه الثغرة لكتابة ملفات خبيثة إلى مواقع حساسة مثل ملفات cron أو مفاتيح SSH المصرح بها، مما يؤدي إلى تنفيذ التعليمات البرمجية عن بعد كاملة.

🤖 ملخص تنفيذي (AI)

نظام إدارة المعرفة SiYuan الإصدارات السابقة للإصدار 3.5.5 تحتوي على ثغرة اجتياز المسار في نقطة نهاية /api/file/copyFile التي تسمح للمستخدمين المصرحين بكتابة الملفات إلى مواقع نظام الملفات التعسفية. يمكن أن يؤدي هذا إلى تنفيذ التعليمات البرمجية عن بعد من خلال التلاعب بملفات النظام الحساسة.

🤖 AI Intelligence Analysis Analyzed: Apr 13, 2026 01:16
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
government banking healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.0
/ 10.0
🔧 Remediation Steps (English)
Immediately upgrade SiYuan to version 3.5.5 or later. Implement strict input validation and sanitization for all file operation parameters. Apply principle of least privilege to application service accounts. Monitor file system access logs for suspicious write operations to sensitive directories. Restrict network access to SiYuan instances to trusted networks only.
🔧 خطوات المعالجة (العربية)
قم بترقية SiYuan فوراً إلى الإصدار 3.5.5 أو أحدث. طبق التحقق الصارم من صحة المدخلات وتنظيفها لجميع معاملات العمليات على الملفات. طبق مبدأ الامتيازات الأقل على حسابات خدمة التطبيق. راقب سجلات الوصول إلى نظام الملفات للعمليات الكتابية المريبة إلى الدلائل الحساسة. قيد الوصول إلى شبكات SiYuan للشبكات الموثوقة فقط.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1 5.2 5.3
🔵 SAMA CSF
CC-6.1 CC-6.2 CC-7.2
🟡 ISO 27001:2022
A.14.2.1 A.14.2.5 A.12.6.1
📦 Affected Products / CPE 1 entries
b3log:siyuan
📊 CVSS Score
9.1
/ 10.0 — Critical
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredH — High
User InteractionN — None / Network
ScopeC — Changed
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity Critical
CVSS Score9.1
CWECWE-22
EPSS0.51%
Exploit ✓ Yes
Patch ✓ Yes
Published 2026-02-04
Source Feed nvd
Views 1
🇸🇦 Saudi Risk Score
9.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
exploit-available patch-available CWE-22
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