📄 Description (English)
The SureForms – Contact Form, Payment Form & Other Custom Form Builder plugin for WordPress is vulnerable to Payment Amount Bypass in all versions up to, and including, 2.5.2. This is due to the create_payment_intent() function performing a payment validation solely based on the value of a user-controlled parameter. This makes it possible for unauthenticated attackers to bypass configured form payment-amount validation and create underpriced payment/subscription intents by setting form_id to 0.
🤖 AI Executive Summary
CVE-2026-4987 is a critical payment validation bypass vulnerability in the SureForms WordPress plugin affecting versions up to 2.5.2. Unauthenticated attackers can manipulate payment amounts by exploiting improper validation in the create_payment_intent() function, allowing them to create underpriced payment intents. This vulnerability poses significant financial risk to Saudi e-commerce platforms, government digital services, and financial institutions relying on WordPress-based payment forms.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Apr 30, 2026 14:03
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability directly impacts Saudi organizations in multiple critical sectors: (1) Banking & Financial Services - SAMA-regulated institutions using WordPress for payment processing face direct financial fraud risk; (2) E-commerce & Retail - Saudi online retailers and payment aggregators (HyperPay, 2Checkout, PayTabs integrations) are at high risk of revenue loss; (3) Government Digital Services - YESSER-enabled government portals accepting online payments could be exploited; (4) Healthcare - Private hospitals and clinics processing patient payments via WordPress forms; (5) Telecommunications - STC and Mobily customer billing portals if WordPress-based; (6) Education - Saudi universities and online education platforms collecting tuition payments. The vulnerability allows complete bypass of payment validation, enabling attackers to pay significantly less than required amounts or create fraudulent subscription intents.
🏢 Affected Saudi Sectors
Banking & Financial Services
E-commerce & Retail
Government Digital Services
Healthcare
Telecommunications
Education
Hospitality & Tourism
Insurance
🎯 MITRE ATT&CK Techniques
T1190 - Exploit Public-Facing Application (WordPress plugin vulnerability)
T1589 - Gather Victim Identity Information (payment data manipulation)
T1598 - Phishing (potential follow-up attacks using compromised payment data)
T1040 - Network Sniffing (interception of payment parameters)
T1110 - Brute Force (testing payment amount variations)
T1021 - Remote Services (WordPress admin access if escalated)
T1083 - File and Directory Discovery (identifying payment form configurations)
T1005 - Data from Local System (extracting payment transaction records)
⚖️ Saudi Risk Score (AI)
8.7
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Disable the SureForms plugin immediately on all WordPress installations until a patch is available
2. Audit payment transaction logs for the past 90 days to identify suspicious transactions with form_id=0 parameter
3. Review payment intent records for amounts significantly lower than configured form prices
4. Contact payment processor (Stripe, PayPal, etc.) to flag potentially fraudulent transactions
PATCHING GUIDANCE:
1. Monitor SureForms official repository for security updates beyond version 2.5.2
2. When patch becomes available, test in staging environment before production deployment
3. Implement automated update notifications for WordPress plugin security releases
COMPENSATING CONTROLS (until patch available):
1. Implement server-side payment validation in payment processor webhooks - verify amount matches form configuration before processing
2. Add Web Application Firewall (WAF) rules to block requests with form_id=0 parameter to payment endpoints
3. Implement rate limiting on payment intent creation endpoints (max 5 requests per minute per IP)
4. Enable payment processor's fraud detection and velocity checks
5. Require manual approval for payment amounts below 50% of configured price
6. Implement IP whitelisting for payment form submissions if possible
DETECTION RULES:
1. Monitor WordPress logs for POST requests to /wp-admin/admin-ajax.php with action=create_payment_intent and form_id=0
2. Alert on payment intents where amount < (configured_price * 0.8)
3. Track failed payment validation attempts and block IPs after 10 attempts
4. Monitor for unusual payment patterns: multiple transactions from same IP with varying amounts
5. Implement SIEM rules to correlate form_id=0 requests with successful payment intents
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تعطيل مكون SureForms فوراً على جميع تثبيتات WordPress حتى توفر تصحيح
2. تدقيق سجلات معاملات الدفع للـ 90 يوماً الماضية لتحديد المعاملات المريبة مع معامل form_id=0
3. مراجعة سجلات نوايا الدفع للمبالغ الأقل بكثير من أسعار النماذج المكونة
4. الاتصال بمعالج الدفع (Stripe و PayPal وغيرها) لتحديد المعاملات المحتملة الاحتيالية
إرشادات التصحيح:
1. مراقبة مستودع SureForms الرسمي للتحديثات الأمنية بعد الإصدار 2.5.2
2. عند توفر التصحيح، اختبره في بيئة التطوير قبل نشره في الإنتاج
3. تنفيذ إشعارات التحديث التلقائية لإصدارات أمان مكونات WordPress
الضوابط البديلة (حتى توفر التصحيح):
1. تنفيذ التحقق من صحة الدفع على جانب الخادم في webhooks معالج الدفع - التحقق من أن المبلغ يطابق تكوين النموذج قبل المعالجة
2. إضافة قواعد جدار الحماية (WAF) لحجب الطلبات مع معامل form_id=0 إلى نقاط نهاية الدفع
3. تنفيذ تحديد معدل على نقاط نهاية إنشاء نوايا الدفع (الحد الأقصى 5 طلبات في الدقيقة لكل عنوان IP)
4. تفعيل كشف الاحتيال والفحوصات السرعة في معالج الدفع
5. طلب الموافقة اليدوية لمبالغ الدفع أقل من 50% من السعر المكون
6. تنفيذ قائمة بيضاء لعناوين IP لتقديم نماذج الدفع إن أمكن
قواعد الكشف:
1. مراقبة سجلات WordPress لطلبات POST إلى /wp-admin/admin-ajax.php مع action=create_payment_intent و form_id=0
2. تنبيه عند نوايا الدفع حيث المبلغ < (السعر_المكون * 0.8)
3. تتبع محاولات التحقق من صحة الدفع الفاشلة وحجب عناوين IP بعد 10 محاولات
4. مراقبة أنماط الدفع غير العادية: معاملات متعددة من نفس عنوان IP بمبالغ مختلفة
5. تنفيذ قواعد SIEM لربط طلبات form_id=0 مع نوايا الدفع الناجحة
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC 2024 - 5.1.1: Access Control - Unauthorized payment manipulation
ECC 2024 - 5.2.1: Input Validation - Improper validation of user-controlled parameters
ECC 2024 - 5.3.2: Data Integrity - Payment amount integrity not enforced
ECC 2024 - 6.1.1: Audit Logging - Transaction logging for fraud detection
ECC 2024 - 7.1.2: Vulnerability Management - Timely patching of critical vulnerabilities
🔵 SAMA CSF
SAMA CSF - Governance & Risk Management: Payment system risk assessment
SAMA CSF - Information Security: Application security controls for payment processing
SAMA CSF - Operational Resilience: Fraud detection and prevention mechanisms
SAMA CSF - Third-party Risk: WordPress plugin security assessment
SAMA CSF - Incident Management: Detection and response to payment fraud attempts
🟡 ISO 27001:2022
ISO 27001:2022 - A.5.15: Access Control - Authentication and authorization for payment functions
ISO 27001:2022 - A.8.3: Cryptography - Secure payment data handling
ISO 27001:2022 - A.8.22: Monitoring - Detection of unauthorized payment modifications
ISO 27001:2022 - A.12.4.1: Logging - Comprehensive audit trails for financial transactions
ISO 27001:2022 - A.14.2.1: Vulnerability Management - Timely remediation of critical flaws
🟣 PCI DSS v4.0.1
PCI DSS 4.0 - Requirement 1: Firewall configuration to block unauthorized payment requests
PCI DSS 4.0 - Requirement 2: Default security parameters for payment processing
PCI DSS 4.0 - Requirement 6.2: Security patches for payment-related software
PCI DSS 4.0 - Requirement 6.5.10: Broken access control in payment functions
PCI DSS 4.0 - Requirement 10: Logging and monitoring of payment transactions
PCI DSS 4.0 - Requirement 12.3: Payment processor security requirements