CVE-2026-59547 in Payment Gateway for PayPal Plugin
Summary
by MITRE • 07/23/2026
Unauthenticated Broken Access Control in Payment Gateway for PayPal on WooCommerce <= 9.1.4 versions.
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Analysis
by VulDB Data Team • 07/23/2026
This vulnerability represents a critical breakdown in access control mechanisms within the PayPal payment gateway integration for WooCommerce platforms, affecting versions up to and including 9.1.4. The flaw allows unauthorized users to bypass authentication requirements and potentially manipulate payment processing workflows without proper authorization. Such a weakness fundamentally undermines the security architecture of e-commerce transactions where payment gateways serve as critical intermediaries between customers and financial systems. The vulnerability stems from insufficient validation of user permissions and authentication states within the payment processing pipeline, creating pathways for malicious actors to exploit gaps in the authorization framework.
The technical implementation of this broken access control manifests through improper validation of user credentials and session management during payment gateway interactions. Attackers can leverage this weakness to perform unauthorized actions such as viewing payment details, modifying transaction records, or executing fraudulent payment processing workflows. The vulnerability typically occurs when the system fails to properly verify that incoming requests originate from authenticated users with appropriate privileges before granting access to sensitive payment functions. This flaw operates at the intersection of authentication and authorization controls, creating opportunities for privilege escalation and data manipulation within the payment ecosystem.
The operational impact of this vulnerability extends beyond simple unauthorized access, potentially enabling financial fraud, data breaches, and service disruption for affected e-commerce platforms. Merchants using vulnerable WooCommerce installations face significant risks including unauthorized fund transfers, fraudulent transaction processing, and exposure of sensitive customer payment information. The consequences can escalate to regulatory compliance violations under standards such as pci dss, which mandate robust access controls for payment card data. Organizations may also experience reputational damage, legal liability, and financial losses resulting from compromised payment processing systems.
Mitigation strategies should focus on implementing proper authentication checks at every stage of the payment processing workflow while ensuring that all user interactions with payment gateway functions are properly validated. Security measures must include comprehensive session management protocols, robust input validation, and strict access control enforcement mechanisms. Organizations should immediately update to patched versions of WooCommerce and related payment gateway plugins, implement network segmentation for payment processing components, and conduct thorough security assessments of their e-commerce infrastructure. Additional controls may include web application firewalls, monitoring systems for anomalous payment processing activities, and regular penetration testing to identify similar access control weaknesses within the payment ecosystem.
This vulnerability aligns with common weakness enumerations such as cwe-285 for improper authorization and cwe-306 for missing authentication checks, while mapping to attack techniques described in the mitre att&ck framework under privilege escalation and credential access categories. The flaw demonstrates how seemingly minor access control oversights can create cascading security risks within complex payment processing systems where multiple components must maintain proper authorization states throughout transaction lifecycles. Organizations should treat this as a high-priority remediation item requiring immediate attention due to the potential for significant financial impact and regulatory consequences associated with compromised payment gateways.