📄 Description (English)
Atlassian Confluence Server Pre-Authorization Arbitrary File Read Vulnerability — Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a pre-authorization arbitrary file read vulnerability in the /s/ endpoint.
🤖 AI Executive Summary
CVE-2021-26085 is a critical pre-authorization arbitrary file read vulnerability in Atlassian Confluence Server affecting the /s/ endpoint, allowing unauthenticated remote attackers to access restricted resources including sensitive documents and configuration files. With a CVSS score of 9.0 and publicly available exploits, this vulnerability poses an immediate threat to organizations using vulnerable Confluence instances. Patching is urgent as exploitation requires no authentication and can lead to exposure of confidential business data, source code, and system configurations.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 20, 2026 08:50
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations across multiple sectors are at significant risk. Government entities and NCA-regulated organizations using Confluence for document management face exposure of classified communications and policy documents. Banking sector (SAMA-regulated) risks disclosure of financial reports, audit trails, and compliance documentation. Energy sector (ARAMCO and subsidiaries) could expose technical specifications and operational data. Telecommunications (STC, Mobily) may leak network architecture and customer data. Healthcare organizations risk HIPAA-equivalent data exposure. Educational institutions and research centers face intellectual property theft. The vulnerability's pre-authentication nature makes it particularly dangerous in Saudi networks where Confluence is widely deployed for enterprise collaboration.
🏢 Affected Saudi Sectors
Government
Banking and Financial Services
Energy and Utilities
Telecommunications
Healthcare
Education and Research
Defense and Security
Manufacturing
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Confluence Server instances in your environment and document their versions
2. Restrict network access to Confluence servers using WAF rules blocking requests to /s/ endpoint patterns
3. Implement IP whitelisting for Confluence access if possible
4. Monitor access logs for suspicious /s/ endpoint requests and file path traversal patterns
PATCHING GUIDANCE:
1. Upgrade Atlassian Confluence Server to patched versions (8.0.3, 7.13.7, 7.12.5, or later depending on your version line)
2. Test patches in non-production environment first
3. Plan maintenance window and execute upgrade immediately
4. Verify patch application by checking version numbers post-upgrade
COMPENSATING CONTROLS (if immediate patching not possible):
1. Deploy Web Application Firewall (WAF) rules to block /s/ endpoint access
2. Implement reverse proxy authentication requiring valid credentials
3. Disable Confluence Server if not critical; migrate to Confluence Cloud
4. Segment Confluence servers on isolated network with strict access controls
DETECTION RULES:
1. Monitor for HTTP requests to /s/ endpoint with path traversal patterns (../, ..\, encoded variants)
2. Alert on successful responses (HTTP 200) to /s/ requests from unauthenticated sources
3. Track file access patterns for sensitive files (confluence.cfg.xml, web.xml, database configs)
4. Log all requests containing file path indicators in /s/ endpoint queries
5. Implement SIEM rules: source_ip != whitelist AND endpoint CONTAINS '/s/' AND auth_status = 'unauthenticated'
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع نسخ Confluence Server في بيئتك وقم بتوثيق إصداراتها
2. قيد الوصول إلى شبكة خوادم Confluence باستخدام قواعد WAF لحجب طلبات نقطة النهاية /s/
3. طبق قائمة بيضاء للعناوين IP للوصول إلى Confluence إن أمكن
4. راقب سجلات الوصول للطلبات المريبة إلى نقطة النهاية /s/ وأنماط اجتياز المسارات
إرشادات التصحيح:
1. قم بترقية Atlassian Confluence Server إلى الإصدارات المصححة (8.0.3، 7.13.7، 7.12.5 أو أحدث حسب سطر الإصدار الخاص بك)
2. اختبر التصحيحات في بيئة غير الإنتاج أولاً
3. خطط لنافذة الصيانة وقم بتنفيذ الترقية فوراً
4. تحقق من تطبيق التصحيح بفحص أرقام الإصدار بعد الترقية
الضوابط البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحجب الوصول إلى نقطة النهاية /s/
2. تطبيق مصادقة وكيل عكسي تتطلب بيانات اعتماد صحيحة
3. تعطيل Confluence Server إذا لم يكن حرجاً؛ الهجرة إلى Confluence Cloud
4. فصل خوادم Confluence على شبكة معزولة مع ضوابط وصول صارمة
قواعد الكشف:
1. راقب طلبات HTTP إلى نقطة النهاية /s/ مع أنماط اجتياز المسارات (../, ..\، المتغيرات المشفرة)
2. تنبيه على الاستجابات الناجحة (HTTP 200) لطلبات /s/ من مصادر غير مصرح لها
3. تتبع أنماط الوصول إلى الملفات الحساسة (confluence.cfg.xml, web.xml, إعدادات قاعدة البيانات)
4. تسجيل جميع الطلبات التي تحتوي على مؤشرات مسار الملف في استعلامات نقطة النهاية /s/
5. تطبيق قواعد SIEM: source_ip != whitelist AND endpoint CONTAINS '/s/' AND auth_status = 'unauthenticated'
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information Security Policies and Procedures
A.6.1.1 - Access Control Policy
A.6.2.1 - User Registration and De-registration
A.6.2.2 - User Access Rights
A.8.1.1 - Cryptography Policy
A.12.2.1 - Restrictions on Software Installation
A.12.6.1 - Management of Technical Vulnerabilities
🔵 SAMA CSF
ID.AM-2: Software Platforms and Applications
PR.AC-1: Identities and Credentials
PR.AC-4: Access Rights Management
PR.PT-2: Removable Media Protection
DE.CM-8: Vulnerability Scans
RS.MI-2: Incident Response Coordination
🟡 ISO 27001:2022
A.5.1 - Management Direction for Information Security
A.6.1 - Internal Organization
A.6.2 - Mobile Device and Teleworking
A.8.1 - User Endpoint Devices
A.12.2 - Restrictions on Software Installation
A.12.6 - Management of Technical Vulnerabilities
A.14.2 - Software Development
🟣 PCI DSS v4.0
Requirement 2.2 - Configuration Standards
Requirement 6.2 - Security Patches
Requirement 6.5.1 - Injection Flaws
Requirement 11.2 - Vulnerability Scanning
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Atlassian:Confluence Server