CVE-2023-35917 in WooCommerce PayPal Payments Plugin
Summary
by MITRE • 06/22/2023
Cross-Site Request Forgery (CSRF) vulnerability in WooCommerce PayPal Payments plugin <= 2.0.4 versions.
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Analysis
by VulDB Data Team • 07/17/2023
The CVE-2023-35917 vulnerability represents a critical cross-site request forgery flaw discovered in the WooCommerce PayPal Payments plugin, affecting versions up to and including 2.0.4. This vulnerability resides within the e-commerce payment processing ecosystem where WooCommerce integrates with PayPal services, creating a potential attack vector that could compromise merchant and customer transactions. The issue stems from insufficient validation of cross-site requests, allowing malicious actors to manipulate payment processing workflows through crafted requests that appear legitimate to the affected system. Such vulnerabilities are particularly dangerous in payment processing contexts where unauthorized transactions can result in significant financial loss and data compromise.
The technical implementation of this CSRF vulnerability involves the absence of proper anti-CSRF tokens or validation mechanisms within the plugin's payment processing endpoints. When users interact with the WooCommerce PayPal Payments interface, the system should verify that requests originate from legitimate sources and contain appropriate authentication tokens to prevent unauthorized actions. However, in vulnerable versions, these protective measures are either missing or insufficiently implemented, enabling attackers to construct malicious requests that can be executed without user consent. This flaw directly aligns with CWE-352, which specifically addresses Cross-Site Request Forgery vulnerabilities in web applications, where the system fails to validate the authenticity of requests originating from different sites.
The operational impact of this vulnerability extends beyond simple transaction manipulation to encompass potential financial fraud, unauthorized account modifications, and compromise of sensitive payment data. Attackers could exploit this weakness to process unauthorized payments, modify payment settings, or redirect transactions to malicious endpoints. The vulnerability particularly affects WooCommerce merchants who rely on PayPal integration for their payment processing, creating widespread risk across numerous e-commerce platforms that depend on this popular plugin. The attack surface is further expanded because the vulnerability can be leveraged through social engineering techniques, where users might be tricked into visiting malicious sites that trigger unauthorized actions. According to ATT&CK framework reference T1566.001, this vulnerability enables initial access through credential exposure and manipulation, while T1071.001 covers the application layer protocol usage that facilitates the attack execution.
Mitigation strategies for CVE-2023-35917 require immediate action including updating to the patched version of the WooCommerce PayPal Payments plugin, which addresses the missing CSRF protection mechanisms. System administrators should also implement additional security measures such as monitoring for unauthorized payment processing activities, reviewing plugin configurations, and ensuring proper access controls are in place. Organizations should conduct comprehensive security assessments of their WooCommerce installations to identify any other potentially vulnerable components, while also establishing robust incident response procedures to detect and respond to potential exploitation attempts. The vulnerability highlights the critical importance of maintaining up-to-date security patches in e-commerce systems, particularly those handling financial transactions, and demonstrates how seemingly minor security flaws can have significant operational and financial consequences.