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Vulnerabilities

CVE-2026-28703

High
Zohocorp ManageEngine Exchange Reporter Plus versions before 5802 are vulnerable to Stored XSS in Mails Exchanged Between Users 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 Mails Exchanged Between Users report.

🤖 AI Executive Summary

ManageEngine Exchange Reporter Plus versions before 5802 contain a Stored XSS vulnerability in the Mails Exchanged Between Users report that allows authenticated attackers to inject malicious scripts. This vulnerability poses a significant risk to organizations using this tool for email reporting and compliance monitoring. With a CVSS score of 7.3, immediate mitigation is required despite the absence of a vendor patch.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 5, 2026 19:33
🇸🇦 Saudi Arabia Impact Assessment
Saudi banking institutions (SAMA-regulated) and government agencies (NCA oversight) using ManageEngine Exchange Reporter Plus for email compliance and audit reporting face significant risk. The vulnerability affects email monitoring capabilities critical for regulatory compliance (SAMA AML/CFT requirements, NCA cybersecurity directives). Telecom operators (STC, Mobily) and healthcare organizations relying on this tool for email governance are also at risk. The stored XSS could enable lateral movement within enterprise networks and compromise sensitive email data subject to Saudi data protection regulations.
🏢 Affected Saudi Sectors
Banking and Financial Services Government and Public Administration Healthcare and Medical Services Energy and Utilities Telecommunications Education Insurance
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
Immediate Actions:
1. Identify all instances of ManageEngine Exchange Reporter Plus running versions before 5802 across your infrastructure
2. Restrict access to the Mails Exchanged Between Users report to trusted administrators only
3. Implement network segmentation to limit lateral movement from compromised reporting interfaces
4. Review email report access logs for suspicious activity or unauthorized report generation

Patching Guidance:
1. Contact Zoho/ManageEngine support for emergency patch availability or timeline
2. Prepare upgrade path to version 5802 or later once available
3. Test patches in isolated environment before production deployment

Compensating Controls (until patch available):
1. Disable the Mails Exchanged Between Users report 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 application level if customization is possible
4. Restrict report access via IP whitelisting and multi-factor authentication
5. Monitor for suspicious JavaScript execution in browser consoles when accessing reports

Detection Rules:
1. Monitor HTTP requests to Exchange Reporter Plus containing script tags or event handlers in report parameters
2. Alert on unusual characters in email subject/sender fields within report data (script, iframe, onerror, onload)
3. Track user sessions accessing the vulnerable report for anomalous behavior
4. Log and review all report exports and scheduled report executions
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع حالات ManageEngine Exchange Reporter Plus التي تعمل بإصدارات سابقة للإصدار 5802 عبر البنية التحتية الخاصة بك
2. تقييد الوصول إلى تقرير رسائل البريد المتبادلة بين المستخدمين للمسؤولين الموثوقين فقط
3. تنفيذ تقسيم الشبكة لتحديد الحركة الجانبية من واجهات الإبلاغ المخترقة
4. مراجعة سجلات الوصول إلى تقرير البريد الإلكتروني للنشاط المريب أو إنشاء التقارير غير المصرح به

إرشادات التصحيح:
1. الاتصال بدعم Zoho/ManageEngine للحصول على توفر التصحيح الطارئ أو الجدول الزمني
2. تحضير مسار الترقية إلى الإصدار 5802 أو أحدث بمجرد توفره
3. اختبار التصحيحات في بيئة معزولة قبل نشر الإنتاج

الضوابط البديلة (حتى توفر التصحيح):
1. تعطيل تقرير رسائل البريد المتبادلة بين المستخدمين إذا لم يكن 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 كان التخصيص ممكناً
4. تقييد الوصول إلى التقرير عبر القائمة البيضاء للعناوين والمصادقة متعددة العوامل
5. مراقبة تنفيذ JavaScript المريب في وحدات تحكم المتصفح عند الوصول إلى التقارير

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 في حقول موضوع/مرسل البريد الإلكتروني ضمن بيانات التقرير (script, iframe, onerror, onload)
3. تتبع جلسات المستخدم التي تصل إلى التقرير الضعيف للسلوك الشاذ
4. تسجيل ومراجعة جميع تصدير التقارير وتنفيذ التقارير المجدولة
📋 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 ID.BE-3 - Organizational governance SAMA CSF PR.AC-1 - Access control policy and procedures SAMA CSF PR.AC-4 - Access rights and privileges SAMA CSF DE.CM-1 - Detection and analysis
🟡 ISO 27001:2022
ISO 27001:2022 A.5.1 - Policies for information security ISO 27001:2022 A.6.1 - Screening ISO 27001:2022 A.8.1 - User endpoint devices ISO 27001:2022 A.8.2 - Privileged access rights ISO 27001:2022 A.14.2 - Supplier relationships
🟣 PCI DSS v4.0.1
PCI DSS 6.5.7 - Cross-site scripting (XSS) PCI DSS 6.2 - Security patches and updates PCI DSS 12.3 - Acceptable use policy
📦 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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