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Vulnerabilities

CVE-2026-8417

High
CWE-352 — 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 does not validate a CSRF token before processing requests to /dashboard/extend/update/do_update/<pkgHandle>. The do_update() method in concrete/controllers/single_page/dashboard/extend/update.php checks only canInstallPackages() before executing upgradeCoreData() and upgrade() on the named package's controller. Because the endpoint is a state-changing GET route with no token enforcement, an attacker can force an authenticated administrator to trigger a package upgrade via a single cross-site navigation.In order to be vulnerable, the victim must be passing canInstallPackages() and and a target package must already be already installed. 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:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks  https://github.com/maru1009  for reporting.

🤖 AI Executive Summary

Concrete CMS versions 9.5.0 and below lack CSRF token validation on package update endpoints, allowing attackers to force administrators to trigger unauthorized package upgrades. An authenticated admin with package installation permissions is required for exploitation, making this a privilege escalation vector for malicious package modifications.

📄 Description (Arabic)

يفتقد Concrete CMS 9.5.0 وأقل التحقق من رموز CSRF على نقطة نهاية /dashboard/extend/update/do_update/<pkgHandle>، مما يسمح بهجمات تزييف الطلبات عبر المواقع. يمكن لمهاجم إجبار مسؤول مصرح به على ترقية حزمة مثبتة بالفعل من خلال التنقل عبر الموقع. يتطلب الاستغلال أن يكون لدى الضحية صلاحيات تثبيت الحزم وأن تكون الحزمة المستهدفة مثبتة بالفعل.

🤖 ملخص تنفيذي (AI)

Concrete CMS الإصدارات 9.5.0 وأقل لا تتحقق من رموز CSRF على نقاط نهاية تحديث الحزم، مما يسمح للمهاجمين بإجبار المسؤولين على تشغيل ترقيات حزم غير مصرح بها. يتطلب المسؤول المصرح به بصلاحيات تثبيت الحزم، مما يجعل هذا متجهاً لتصعيد الامتيازات للتعديلات الضارة على الحزم.

🤖 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)
Upgrade Concrete CMS to version 9.5.1 or later immediately. Implement Web Application Firewall (WAF) rules to detect and block suspicious package update requests. Review administrator access logs for unauthorized package modifications. Restrict package installation permissions to essential administrators only. Enable CSRF protection headers (SameSite cookies) at the application and server level.
🔧 خطوات المعالجة (العربية)
قم بترقية Concrete CMS إلى الإصدار 9.5.1 أو أحدث فوراً. طبق قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن طلبات تحديث الحزم المريبة وحجبها. راجع سجلات وصول المسؤول للتعديلات غير المصرح بها على الحزم. قيد صلاحيات تثبيت الحزم للمسؤولين الأساسيين فقط. فعّل رؤوس حماية CSRF (ملفات تعريف الارتباط SameSite) على مستوى التطبيق والخادم.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5.1.1 5.1.2 5.2.1
🔵 SAMA CSF
AC-3 AC-6 SI-10
🟡 ISO 27001:2022
A.9.2.1 A.9.2.5 A.14.2.1
📦 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:N/UI:R/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.8
CWECWE-352
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-352
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