📄 Description (English)
The Perfmatters plugin for WordPress is vulnerable to arbitrary file overwrite via path traversal in all versions up to, and including, 2.5.9. This is due to the `PMCS::action_handler()` method processing the bulk action `activate`/`deactivate` handlers without any authorization check or nonce verification. The `$_GET['snippets'][]` values are passed unsanitized to `Snippet::activate()`/`Snippet::deactivate()` which call `Snippet::update()` then `file_put_contents()` with the traversed path. This makes it possible for authenticated attackers, with Subscriber-level access and above, to overwrite arbitrary files on the server with a fixed PHP docblock content, potentially causing denial of service by corrupting critical files like `.htaccess` or `index.php`.
🤖 AI Executive Summary
CVE-2026-4351 is a critical path traversal vulnerability in the Perfmatters WordPress plugin (versions ≤2.5.9) that allows authenticated users with Subscriber-level access to overwrite arbitrary files on web servers. The vulnerability exploits insufficient input validation in the bulk action handler, enabling attackers to corrupt critical files like .htaccess or index.php, causing denial of service. With no patch currently available, this poses an immediate threat to WordPress installations across Saudi Arabia's digital infrastructure.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 26, 2026 08:16
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses significant risk to Saudi organizations operating WordPress-based digital platforms, particularly: (1) Government agencies and ministries using WordPress for public-facing portals and content management; (2) Banking and financial institutions with WordPress-based customer portals or informational websites; (3) E-commerce platforms and retail businesses relying on WordPress; (4) Healthcare providers using WordPress for patient information systems; (5) Telecommunications companies with WordPress-based customer service platforms. The ability for low-privilege users (Subscriber level) to execute this attack makes it particularly dangerous in multi-tenant WordPress environments common in Saudi Arabia's shared hosting landscape. Organizations under SAMA, NCA, and CITC regulatory oversight face compliance violations if customer data or critical systems are compromised.
🏢 Affected Saudi Sectors
Government and Public Administration
Banking and Financial Services
E-commerce and Retail
Healthcare and Medical Services
Telecommunications
Education and Universities
Media and Publishing
Hospitality and Tourism
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
8.4
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Audit all WordPress installations using Perfmatters plugin version 2.5.9 or earlier across your organization
2. Disable the Perfmatters plugin immediately by renaming the plugin directory or deactivating through WordPress admin
3. Review file modification logs (access logs, file integrity monitoring) for suspicious file_put_contents() calls to .htaccess, index.php, wp-config.php, and other critical files
4. Check for unauthorized file modifications in the past 30-90 days, particularly files with PHP docblock content
COMPENSATING CONTROLS (until patch available):
5. Implement strict file permissions: set wp-config.php, .htaccess, and index.php to read-only (644 or 444)
6. Restrict file_put_contents() function via php.ini or disable_functions directive
7. Implement Web Application Firewall (WAF) rules to block requests containing path traversal patterns (../, ..\ ) in GET parameters
8. Enforce strong authentication: disable Subscriber-level access for non-essential users; require multi-factor authentication
9. Implement file integrity monitoring (FIM) on critical WordPress files to detect unauthorized modifications in real-time
10. Configure WordPress to prevent direct file editing: add define('DISALLOW_FILE_EDIT', true); to wp-config.php
DETECTION RULES:
11. Monitor for HTTP requests with 'snippets[]' parameter containing path traversal sequences
12. Alert on file_put_contents() calls originating from wp-admin/admin-ajax.php with action=pmcs_handler
13. Monitor for modifications to .htaccess, index.php, wp-config.php, and wp-load.php files
14. Log all bulk action requests and correlate with file modification timestamps
PATCHING STRATEGY:
15. Monitor Perfmatters official repository for security patch release
16. Once patch is available, test in staging environment before production deployment
17. If plugin is no longer maintained, consider migration to alternative code snippet management solutions
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تدقيق جميع تثبيتات WordPress التي تستخدم مكون Perfmatters الإصدار 2.5.9 أو أقدم عبر مؤسستك
2. تعطيل مكون Perfmatters فوراً بإعادة تسمية دليل المكون أو إلغاء التفعيل من خلال لوحة تحكم WordPress
3. مراجعة سجلات تعديل الملفات (سجلات الوصول، مراقبة سلامة الملفات) للبحث عن استدعاءات file_put_contents() المريبة
4. التحقق من التعديلات غير المصرح بها على الملفات في آخر 30-90 يوماً
الضوابط التعويضية (حتى توفر التصحيح):
5. تطبيق أذونات ملفات صارمة: اضبط wp-config.php و .htaccess و index.php على القراءة فقط
6. تقييد وظيفة file_put_contents() عبر php.ini أو توجيه disable_functions
7. تطبيق قواعد جدار حماية تطبيقات الويب (WAF) لحظر الطلبات التي تحتوي على أنماط اجتياز المسار
8. فرض مصادقة قوية: تعطيل وصول مستوى المشترك للمستخدمين غير الأساسيين
9. تطبيق مراقبة سلامة الملفات (FIM) على ملفات WordPress الحرجة
10. تكوين WordPress لمنع تحرير الملفات المباشر: أضف define('DISALLOW_FILE_EDIT', true);
قواعد الكشف:
11. مراقبة طلبات HTTP التي تحتوي على معامل 'snippets[]' يحتوي على تسلسلات اجتياز المسار
12. تنبيه عند استدعاءات file_put_contents() الناشئة من wp-admin/admin-ajax.php
13. مراقبة التعديلات على الملفات الحرجة
14. تسجيل جميع طلبات الإجراء الجماعي والربط مع طوابع زمن تعديل الملفات
استراتيجية التصحيح:
15. مراقبة مستودع Perfmatters الرسمي لإصدار تصحيح أمني
16. عند توفر التصحيح، اختبره في بيئة التطوير قبل نشره في الإنتاج
17. إذا لم يعد المكون مدعوماً، فكر في الهجرة إلى حلول بديلة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.5.1.1 - Information security policies and procedures
A.8.1.1 - User access management and authentication
A.12.2.1 - Change management procedures
A.12.4.1 - Event logging and monitoring
A.14.2.1 - Secure development and maintenance
🔵 SAMA CSF
ID.AM-2 - Software inventory and asset management
PR.AC-1 - Access control and authentication
PR.PT-2 - Protective technology deployment
DE.CM-1 - System monitoring and anomaly detection
RS.MI-2 - Incident response and containment
🟡 ISO 27001:2022
A.5.1.1 - Information security policies
A.6.1.1 - Information security roles and responsibilities
A.8.1.1 - User registration and access rights
A.12.2.1 - Change management
A.12.4.1 - Event logging
A.14.2.1 - Secure development policy
🟣 PCI DSS v4.0.1
Requirement 1.1 - Firewall configuration standards
Requirement 2.2.4 - Configure system security parameters
Requirement 6.2 - Security patches and updates
Requirement 6.5.1 - Injection flaws prevention
Requirement 10.2 - User access logging