📄 Description (English)
PHPMailer Command Injection Vulnerability — PHPMailer contains a command injection vulnerability because it fails to sanitize user-supplied input. Specifically, this issue affects the 'mail()' function of 'class.phpmailer.php' script. An attacker can exploit this issue to execute arbitrary code within the context of the application. Failed exploit attempts will result in a denial-of-service condition.
🤖 AI Executive Summary
CVE-2016-10033 is a critical command injection vulnerability in PHPMailer, one of the most widely used PHP email libraries. The flaw allows remote attackers to inject arbitrary OS commands through the email sender parameter due to insufficient sanitization in the mail() function. With a CVSS score of 9.0 and publicly available exploits, this vulnerability enables remote code execution (RCE) on any web application using vulnerable PHPMailer versions (before 5.2.18). Given PHPMailer's ubiquity in PHP-based web applications, contact forms, and CMS platforms like WordPress, Drupal, and Joomla, the attack surface is extremely broad.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 5, 2026 02:48
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations across multiple sectors. Government portals and e-services (managed under NCA oversight) frequently use PHP-based CMS platforms that bundle PHPMailer. Banking and financial institutions regulated by SAMA that maintain customer-facing web applications with contact forms or email notification features are at risk of full server compromise. Healthcare systems, educational institutions, and energy sector web portals (including ARAMCO and subsidiary web applications) running legacy PHP applications are particularly vulnerable. Telecom providers like STC, Mobily, and Zain with self-service portals may also be affected. The availability of public exploits makes this an actively weaponizable vulnerability, and Saudi organizations running unpatched legacy PHP applications remain at high risk even years after disclosure.
🏢 Affected Saudi Sectors
Government
Banking
Healthcare
Energy
Telecom
Education
Retail
E-commerce
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all instances of PHPMailer in your environment using software composition analysis (SCA) tools or manual search for 'class.phpmailer.php'
2. Upgrade PHPMailer to version 5.2.18 or later immediately (preferably latest 6.x branch)
3. If using WordPress, Drupal, Joomla, or other CMS, update all plugins/modules that bundle PHPMailer
COMPENSATING CONTROLS (if immediate patching is not possible):
1. Configure PHP to use SMTP transport instead of the mail() function by setting PHPMailer to use SMTP mode ($mail->isSMTP())
2. Implement strict input validation on all email-related fields, especially the 'From' address
3. Deploy WAF rules to detect and block command injection patterns in email parameters
4. Restrict the web server user's ability to execute system commands using PHP disable_functions directive
DETECTION RULES:
1. Monitor web server logs for unusual characters in email form submissions (backticks, -X, -OQueueDirectory, -C flags)
2. Deploy IDS/IPS signatures for PHPMailer exploitation attempts
3. Monitor for unexpected outbound connections or file creation from web server processes
4. Search for indicators of compromise: unexpected files in /tmp or web directories, reverse shells
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع نسخ PHPMailer في بيئتكم باستخدام أدوات تحليل مكونات البرمجيات أو البحث اليدوي عن 'class.phpmailer.php'
2. ترقية PHPMailer إلى الإصدار 5.2.18 أو أحدث فوراً (يفضل أحدث إصدار من الفرع 6.x)
3. في حال استخدام WordPress أو Drupal أو Joomla أو أنظمة إدارة محتوى أخرى، تحديث جميع الإضافات والوحدات التي تتضمن PHPMailer
الضوابط التعويضية (في حال عدم إمكانية التحديث الفوري):
1. تكوين PHP لاستخدام نقل SMTP بدلاً من دالة mail() عن طريق ضبط PHPMailer على وضع SMTP ($mail->isSMTP())
2. تطبيق تحقق صارم من المدخلات على جميع حقول البريد الإلكتروني، خاصة عنوان المرسل
3. نشر قواعد جدار حماية تطبيقات الويب لاكتشاف وحظر أنماط حقن الأوامر في معاملات البريد الإلكتروني
4. تقييد قدرة مستخدم خادم الويب على تنفيذ أوامر النظام باستخدام توجيه disable_functions في PHP
قواعد الكشف:
1. مراقبة سجلات خادم الويب بحثاً عن أحرف غير عادية في نماذج البريد الإلكتروني
2. نشر توقيعات IDS/IPS لمحاولات استغلال PHPMailer
3. مراقبة الاتصالات الصادرة غير المتوقعة أو إنشاء ملفات من عمليات خادم الويب
4. البحث عن مؤشرات الاختراق: ملفات غير متوقعة في /tmp أو مجلدات الويب
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2-3-1 (Vulnerability Management)
ECC 2-3-4 (Patch Management)
ECC 2-5-1 (Web Application Security)
ECC 2-2-3 (Secure Software Development)
ECC 2-6-1 (Security Monitoring)
🔵 SAMA CSF
3.3.3 (Patch Management)
3.3.5 (Vulnerability Management)
3.4.1 (Application Security)
3.3.7 (Security Event Monitoring)
3.2.2 (Asset Management)
🟡 ISO 27001:2022
A.8.8 (Management of Technical Vulnerabilities)
A.8.9 (Configuration Management)
A.8.28 (Secure Coding)
A.8.16 (Monitoring Activities)
A.8.25 (Secure Development Life Cycle)
🟣 PCI DSS v4.0
6.2 (Establish a process to identify and assign a risk ranking to newly discovered security vulnerabilities)
6.3 (Develop internal and external software applications securely)
6.4 (Follow change control processes for all changes to system components)
6.5.1 (Injection flaws)
11.2 (Run internal and external network vulnerability scans)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
PHP:PHPMailer