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Global vulnerability Information Technology CRITICAL 39m Global supply_chain Software Development and Technology HIGH 1h Global vulnerability Information Technology and Telecommunications CRITICAL 1h Global apt Financial Services, Banking HIGH 7h Global vulnerability Technology and Software Development HIGH 10h Global vulnerability Government and Federal Agencies CRITICAL 10h Global supply_chain Software Development and Open-Source Ecosystems HIGH 11h Global vulnerability Enterprise Software/SaaS MEDIUM 11h Global supply_chain Software Development HIGH 11h Global general Insurance/Risk Management HIGH 11h Global vulnerability Information Technology CRITICAL 39m Global supply_chain Software Development and Technology HIGH 1h Global vulnerability Information Technology and Telecommunications CRITICAL 1h Global apt Financial Services, Banking HIGH 7h Global vulnerability Technology and Software Development HIGH 10h Global vulnerability Government and Federal Agencies CRITICAL 10h Global supply_chain Software Development and Open-Source Ecosystems HIGH 11h Global vulnerability Enterprise Software/SaaS MEDIUM 11h Global supply_chain Software Development HIGH 11h Global general Insurance/Risk Management HIGH 11h Global vulnerability Information Technology CRITICAL 39m Global supply_chain Software Development and Technology HIGH 1h Global vulnerability Information Technology and Telecommunications CRITICAL 1h Global apt Financial Services, Banking HIGH 7h Global vulnerability Technology and Software Development HIGH 10h Global vulnerability Government and Federal Agencies CRITICAL 10h Global supply_chain Software Development and Open-Source Ecosystems HIGH 11h Global vulnerability Enterprise Software/SaaS MEDIUM 11h Global supply_chain Software Development HIGH 11h Global general Insurance/Risk Management HIGH 11h
Vulnerabilities

CVE-2026-8350

High
CWE-863 — Weakness Type
Published: May 21, 2026  ·  Modified: May 28, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

Concrete CMS 9.5.0 and below is vulnerable to missing authorization in the bulk_user_assignment.php which can lead to privilege escalation to Administrative Group. Any authenticated user with access to the bulk user assignment dashboard page can add any user email to any group and can remove legitimate admins. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 7.5 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks Vincent55 for reporting.

🤖 AI Executive Summary

Concrete CMS 9.5.0 and below contains a missing authorization vulnerability in bulk_user_assignment.php that allows authenticated users to escalate privileges to Administrative Group. An attacker can add users to administrative groups and remove legitimate administrators, compromising system access control.

📄 Description (Arabic)

تحتوي ثغرة التفويض المفقودة في Concrete CMS على نقطة ضعف حرجة حيث يمكن لأي مستخدم مصرح بالوصول إلى لوحة تحكم إسناد المستخدمين بشكل جماعي إضافة أي بريد إلكتروني للمستخدم إلى أي مجموعة. يمكن للمهاجم إزالة المسؤولين الشرعيين والاستيلاء على السيطرة الإدارية الكاملة للنظام.

🤖 ملخص تنفيذي (AI)

نظام Concrete CMS الإصدار 9.5.0 وما دونه يحتوي على ثغرة تفويض مفقودة في ملف bulk_user_assignment.php تسمح للمستخدمين المصرحين بتصعيد الامتيازات إلى مجموعة إدارية. يمكن للمهاجم إضافة مستخدمين إلى مجموعات إدارية وإزالة المسؤولين الشرعيين.

🤖 AI Intelligence Analysis Analyzed: May 26, 2026 21:22
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
government telecom banking healthcare
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.0
/ 10.0
🔧 Remediation Steps (English)
Update Concrete CMS to version 9.5.1 or later immediately. Implement strict role-based access control (RBAC) for bulk user assignment functionality. Restrict access to bulk_user_assignment.php to administrators only. Monitor and audit all user group modifications. Review and revoke unauthorized administrative group memberships.
🔧 خطوات المعالجة (العربية)
قم بتحديث Concrete CMS إلى الإصدار 9.5.1 أو أحدث فوراً. طبق التحكم في الوصول القائم على الأدوار الصارمة لوظيفة إسناد المستخدمين بشكل جماعي. قيد الوصول إلى ملف bulk_user_assignment.php للمسؤولين فقط. راقب وتدقيق جميع تعديلات مجموعات المستخدمين. راجع وألغِ عضويات مجموعة إدارية غير مصرح بها.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1.1 5.2.1 5.3.1
🔵 SAMA CSF
AC-2 AC-3 AC-6
🟡 ISO 27001:2022
A.9.1.1 A.9.2.1 A.9.4.3
📦 Affected Products / CPE 1 entries
concretecms:concrete_cms
📊 CVSS Score
8.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.8
CWECWE-863
EPSS0.03%
Exploit No
Patch ✗ No
Published 2026-05-21
Source Feed nvd
🇸🇦 Saudi Risk Score
8.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-863
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