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Vulnerabilities

CVE-2026-27655

High
Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 are vulnerable to Stored XSS in Permissions Based on Mailboxes report.
CWE-79 — Weakness Type
Published: Apr 3, 2026  ·  Modified: Apr 6, 2026  ·  Source: NVD
CVSS v3
7.3
🔗 NVD Official
📄 Description (English)

Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 are vulnerable to Stored XSS in Permissions Based on Mailboxes report.

🤖 AI Executive Summary

ManageEngine Exchange Reporter Plus versions before 5802 contain a Stored XSS vulnerability in the Permissions Based on Mailboxes report functionality. This allows authenticated attackers to inject malicious scripts that persist in the application and execute when other users access the affected report. With a CVSS score of 7.3, this poses a significant risk to organizations managing Exchange environments, particularly those relying on this tool for compliance and reporting.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 5, 2026 16:49
🇸🇦 Saudi Arabia Impact Assessment
Saudi organizations using ManageEngine Exchange Reporter Plus are at significant risk, particularly: (1) Banking sector institutions relying on this tool for mailbox compliance and audit reporting under SAMA requirements; (2) Government entities and NCA-regulated organizations using Exchange for secure communications; (3) Large enterprises and telecommunications providers (STC, Mobily) managing multi-tenant Exchange environments; (4) Healthcare organizations subject to GDPR-equivalent data protection requirements. The stored XSS vulnerability could enable privilege escalation, unauthorized access to sensitive mailbox data, and compromise of audit trails critical for regulatory compliance.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Telecommunications Healthcare Energy and Utilities Large Enterprises
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all instances of ManageEngine Exchange Reporter Plus running versions 5800, 5801, or earlier
2. Restrict access to the Permissions Based on Mailboxes report to trusted administrators only
3. Review audit logs for suspicious activity in report generation and access patterns
4. Implement network segmentation to limit access to the Exchange Reporter Plus application

PATCHING GUIDANCE:
1. Upgrade to version 5802 or later immediately when available
2. Contact Zoho support for patch availability timeline and interim security updates
3. Test patches in non-production environment before deployment

COMPENSATING CONTROLS (until patch available):
1. Disable the Permissions Based on Mailboxes report functionality if not actively used
2. Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in report parameters
3. Apply input validation and output encoding at the application level if configuration options exist
4. Restrict report access via role-based access control to administrative users only
5. Monitor for suspicious JavaScript execution in browser console logs

DETECTION RULES:
1. Monitor HTTP requests to Exchange Reporter Plus containing script tags or event handlers in report parameters
2. Alert on unusual characters or encoded payloads in mailbox permission report submissions
3. Track changes to report definitions and stored report data
4. Monitor for multiple failed authentication attempts followed by report access
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نسخ ManageEngine Exchange Reporter Plus التي تعمل بالإصدارات 5800 أو 5801 أو الإصدارات الأقدم
2. تقييد الوصول إلى تقرير الأذونات بناءً على صناديق البريد للمسؤولين الموثوقين فقط
3. مراجعة سجلات التدقيق للنشاط المريب في إنشاء التقارير وأنماط الوصول
4. تنفيذ تقسيم الشبكة لتحديد الوصول إلى تطبيق Exchange Reporter Plus

إرشادات التصحيح:
1. الترقية إلى الإصدار 5802 أو الإصدارات الأحدث فوراً عند توفره
2. الاتصال بدعم Zoho للحصول على جدول توفر التصحيح والتحديثات الأمنية المؤقتة
3. اختبار التصحيحات في بيئة غير الإنتاج قبل النشر

الضوابط البديلة (حتى توفر التصحيح):
1. تعطيل وظيفة تقرير الأذونات بناءً على صناديق البريد إذا لم تكن قيد الاستخدام النشط
2. تنفيذ قواعد جدار حماية تطبيقات الويب (WAF) للكشف عن حمولات XSS وحجبها في معاملات التقرير
3. تطبيق التحقق من الإدخال والترميز الناتج على مستوى التطبيق إذا كانت خيارات التكوين موجودة
4. تقييد وصول التقرير عبر التحكم في الوصول المستند إلى الأدوار للمستخدمين الإداريين فقط
5. مراقبة تنفيذ JavaScript المريب في سجلات وحدة تحكم المتصفح

قواعد الكشف:
1. مراقبة طلبات HTTP إلى Exchange Reporter Plus التي تحتوي على علامات نصية أو معالجات أحداث في معاملات التقرير
2. التنبيه على الأحرف غير العادية أو الحمولات المشفرة في تقديمات تقرير أذونات صناديق البريد
3. تتبع التغييرات في تعريفات التقارير والبيانات المخزنة في التقارير
4. مراقبة محاولات المصادقة الفاشلة المتعددة متبوعة بوصول التقرير
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.14.2.1 - Information security requirements for supplier relationships ECC 2024 A.5.1.1 - Policies for information security ECC 2024 A.14.2.5 - Addressing information security in supplier agreements
🔵 SAMA CSF
SAMA CSF 2.1 - Governance and Risk Management SAMA CSF 3.2 - Access Control and Authentication SAMA CSF 4.1 - Data Protection and Privacy SAMA CSF 5.2 - Incident Detection and Response
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security ISO 27001:2022 A.6.1 - Screening and vetting ISO 27001:2022 A.8.1 - User endpoint devices ISO 27001:2022 A.8.2 - Privileged access rights ISO 27001:2022 A.8.3 - Information access restriction
🟣 PCI DSS v4.0.1
PCI DSS 6.5.7 - Cross-site scripting (XSS) prevention PCI DSS 6.2 - Security patches and updates PCI DSS 7.1 - Limit access to system components by business need to know
📦 Affected Products / CPE 4 entries
zohocorp:manageengine_exchange_reporter_plus
zohocorp:manageengine_exchange_reporter_plus:5.8
zohocorp:manageengine_exchange_reporter_plus:5.8
zohocorp:manageengine_exchange_reporter_plus:5.8
📊 CVSS Score
7.3
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredL — Low / Local
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityN — None / Network
📋 Quick Facts
Severity High
CVSS Score7.3
CWECWE-79
EPSS0.02%
Exploit No
Patch ✗ No
Published 2026-04-03
Source Feed nvd
Views 4
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-79
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