📄 Description (English)
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
🤖 AI Executive Summary
CVE-2026-33113 is a stored XSS vulnerability in Microsoft Office SharePoint affecting authorized users. With a CVSS score of 5.4, it enables attackers to inject malicious scripts for spoofing attacks. While no public exploit exists and no patch is currently available, the vulnerability poses moderate risk to organizations relying on SharePoint for document collaboration and internal communications.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Jun 9, 2026 20:19
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations in banking (SAMA-regulated institutions), government agencies (NCA oversight), and large enterprises using SharePoint for internal collaboration face moderate risk. The vulnerability primarily affects authorized users, limiting exposure but creating insider threat concerns. Financial institutions and government entities managing sensitive documents through SharePoint are most vulnerable to spoofing attacks that could compromise document authenticity and user trust.
🏢 Affected Saudi Sectors
Banking and Financial Services
Government and Public Administration
Healthcare
Energy and Utilities
Telecommunications
Large Enterprises
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
5.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Inventory all SharePoint deployments across the organization and document version numbers
2. Restrict SharePoint access to essential personnel only; implement principle of least privilege
3. Enable SharePoint audit logging to detect suspicious content modifications
4. Educate users on recognizing spoofed content and reporting suspicious activities
Compensating Controls:
1. Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in SharePoint requests
2. Deploy Content Security Policy (CSP) headers to prevent inline script execution
3. Enable SharePoint's built-in input validation and sanitization features
4. Conduct regular security awareness training focusing on XSS and spoofing risks
5. Monitor SharePoint logs for unusual script injection attempts using SIEM
Detection Rules:
1. Alert on SharePoint list/library modifications containing script tags (<script>, javascript:, onerror=, onload=)
2. Monitor for unusual HTML/JavaScript content in document metadata and descriptions
3. Track failed and successful authentication attempts to SharePoint with subsequent content modifications
4. Flag rapid successive content uploads/modifications by single user accounts
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حصر جميع نشرات SharePoint عبر المنظمة وتوثيق أرقام الإصدارات
2. تقييد الوصول إلى SharePoint للموظفين الأساسيين فقط؛ تطبيق مبدأ الامتياز الأدنى
3. تفعيل تسجيل تدقيق SharePoint للكشف عن تعديلات المحتوى المريبة
4. تثقيف المستخدمين حول التعرف على المحتوى المزيف والإبلاغ عن الأنشطة المريبة
الضوابط التعويضية:
1. تطبيق قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن حمولات XSS وحجبها في طلبات SharePoint
2. نشر رؤوس سياسة أمان المحتوى (CSP) لمنع تنفيذ البرامج النصية المضمنة
3. تفعيل ميزات التحقق من صحة الإدخال والتطهير المدمجة في SharePoint
4. إجراء تدريب منتظم على الوعي الأمني يركز على مخاطر XSS والتزييف
5. مراقبة سجلات SharePoint لمحاولات حقن البرامج النصية غير العادية باستخدام SIEM
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.14.2.1 - Information security requirements in business processes
ECC 2024 A.14.2.5 - Secure development policy and procedures
ECC 2024 A.12.6.1 - Management of technical vulnerabilities
🔵 SAMA CSF
SAMA CSF ID.BE-3 - Organizational resilience
SAMA CSF PR.DS-6 - Data is protected from unauthorized access
SAMA CSF DE.CM-1 - The network is monitored to detect potential cybersecurity events
🟡 ISO 27001:2022
ISO 27001:2022 A.5.23 - Information security for supplier relationships
ISO 27001:2022 A.8.22 - Monitoring activities
ISO 27001:2022 A.8.24 - Event logging
🔗 References & Sources 1