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Vulnerabilities

CVE-2021-47873

High
VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interf
CWE-79 — Weakness Type
Published: Jan 21, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
7.2
🔗 NVD Official
📄 Description (English)

VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a stored XSS payload.

🤖 AI Executive Summary

CVE-2021-47873 is a stored cross-site scripting (XSS) vulnerability in VestaCP versions before 0.9.8-25 affecting the IP interface configuration module. Attackers can inject malicious scripts through the 'v_interface' parameter, potentially compromising administrator accounts and sensitive infrastructure configurations. This vulnerability poses significant risk to organizations using VestaCP for hosting and server management, particularly in Saudi Arabia's growing hosting and cloud service sectors.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: May 8, 2026 01:19
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability primarily impacts Saudi hosting providers, data center operators, and organizations managing their own infrastructure through VestaCP. At-risk sectors include: (1) Telecommunications providers (STC, Mobily, Zain) using VestaCP for infrastructure management; (2) Government agencies and entities under NCA oversight managing internal hosting; (3) Financial institutions and banks using VestaCP for non-critical infrastructure; (4) Healthcare organizations (MOH, private hospitals) with web-based systems; (5) E-commerce and digital service providers. The stored XSS nature allows persistent compromise of administrator interfaces, potentially leading to unauthorized access to sensitive configurations, customer data exposure, and lateral movement within organizational networks.
🏢 Affected Saudi Sectors
Telecommunications (STC, Mobily, Zain) Government and Public Administration Banking and Financial Services Healthcare (MOH, Private Hospitals) E-commerce and Digital Services Hosting and Data Center Operations Cloud Service Providers Education and Universities
⚖️ Saudi Risk Score (AI)
7.8
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all VestaCP installations in your environment and document their versions
2. Restrict administrative access to VestaCP interfaces using network-level controls (WAF, IP whitelisting)
3. Implement input validation and output encoding on the IP configuration interface
4. Monitor access logs for suspicious POST requests to /add/ip/ endpoint

PATCHING:
1. Upgrade VestaCP to version 0.9.8-25 or later immediately
2. Verify patch installation by checking version in admin panel
3. Clear browser cache and cookies after patching
4. Test IP configuration functionality post-upgrade

COMPENSATING CONTROLS (if immediate patching not possible):
1. Deploy Web Application Firewall (WAF) rules to block malicious payloads in v_interface parameter
2. Implement Content Security Policy (CSP) headers to prevent inline script execution
3. Use HTTP-only and Secure flags on session cookies
4. Enforce multi-factor authentication for all administrative accounts
5. Implement network segmentation to isolate VestaCP management interfaces

DETECTION:
1. Monitor for POST requests to /add/ip/ containing script tags or event handlers
2. Alert on unusual characters in v_interface parameter (< > ' " ; etc.)
3. Review admin panel access logs for unauthorized IP configuration changes
4. Implement SIEM rules for XSS payload patterns in HTTP requests
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. حدد جميع تثبيتات VestaCP في بيئتك وقم بتوثيق إصداراتها
2. قيد الوصول الإداري إلى واجهات VestaCP باستخدام عناصر التحكم على مستوى الشبكة (WAF، تصفية IP)
3. طبق التحقق من صحة الإدخال والترميز على واجهة تكوين IP
4. راقب سجلات الوصول للطلبات المريبة من نوع POST إلى نقطة نهاية /add/ip/

التصحيح:
1. قم بترقية VestaCP إلى الإصدار 0.9.8-25 أو أحدث على الفور
2. تحقق من تثبيت التصحيح بالتحقق من الإصدار في لوحة المسؤول
3. امسح ذاكرة التخزين المؤقت للمتصفح وملفات تعريف الارتباط بعد التصحيح
4. اختبر وظيفة تكوين IP بعد الترقية

عناصر التحكم البديلة (إذا لم يكن التصحيح الفوري ممكناً):
1. نشر قواعد جدار حماية تطبيقات الويب (WAF) لحظر الحمولات الضارة في معامل v_interface
2. طبق رؤوس سياسة أمان المحتوى (CSP) لمنع تنفيذ النصوص البرمجية المضمنة
3. استخدم أعلام HTTP-only و Secure على ملفات تعريف الارتباط للجلسة
4. فرض المصادقة متعددة العوامل لجميع الحسابات الإدارية
5. طبق تقسيم الشبكة لعزل واجهات إدارة VestaCP

الكشف:
1. راقب طلبات POST إلى /add/ip/ التي تحتوي على علامات نصية برمجية أو معالجات أحداث
2. تنبيه على الأحرف غير العادية في معامل v_interface (< > ' " ; إلخ)
3. راجع سجلات الوصول إلى لوحة المسؤول للتغييرات غير المصرح بها في تكوين IP
4. طبق قواعل SIEM لأنماط حمولات XSS في طلبات HTTP
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 A.14.2.1 - Information security requirements for supplier relationships ECC 2024 A.14.2.5 - Addressing information security in supplier agreements ECC 2024 A.5.23 - Web application security controls ECC 2024 A.6.2 - Access control and authentication mechanisms
🔵 SAMA CSF
SAMA CSF 1.1 - Governance and Risk Management SAMA CSF 2.2 - Information and Communications Technology (ICT) Security SAMA CSF 2.2.1 - Access Control and Authentication SAMA CSF 2.2.4 - Data Protection and Privacy
🟡 ISO 27001:2022
ISO 27001:2022 A.5.15 - Access control ISO 27001:2022 A.5.16 - Authentication ISO 27001:2022 A.8.22 - Web application security ISO 27001:2022 A.8.24 - Protection against malware
🟣 PCI DSS v4.0.1
PCI DSS 6.5.1 - Injection flaws prevention PCI DSS 6.5.7 - Cross-site scripting (XSS) prevention PCI DSS 6.6 - Security testing and assessment
📊 CVSS Score
7.2
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionN — None / Network
ScopeC — Changed
ConfidentialityL — Low / Local
IntegrityL — Low / Local
AvailabilityN — None / Network
📋 Quick Facts
Severity High
CVSS Score7.2
CWECWE-79
EPSS0.04%
Exploit No
Patch ✓ Yes
Published 2026-01-21
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
7.8
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
CWE-79
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