CVE-2023-40608 in Paid Memberships Pro CCBill Gateway Plugin
Summary
by MITRE • 06/19/2024
Missing Authorization vulnerability in Paid Memberships Pro Paid Memberships Pro CCBill Gateway.This issue affects Paid Memberships Pro CCBill Gateway: from n/a through 0.3.
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Analysis
by VulDB Data Team • 06/20/2024
The CVE-2023-40608 vulnerability represents a critical authorization flaw within the Paid Memberships Pro CCBill Gateway component of the popular membership management plugin for WordPress. This missing authorization issue occurs in versions ranging from the initial release through version 0.3, creating a significant security gap that could allow unauthorized users to bypass the intended access controls. The vulnerability specifically impacts the payment processing functionality where the system fails to properly verify user permissions before executing sensitive operations related to membership transactions and payment gateway interactions. This flaw essentially creates a backdoor through which malicious actors could potentially manipulate membership status, process unauthorized payments, or gain access to protected membership data without proper authentication.
The technical implementation of this vulnerability stems from inadequate input validation and access control mechanisms within the CCBill gateway integration. When users attempt to process payments or manage membership levels through the plugin, the system should verify that the requesting user possesses appropriate authorization rights before proceeding with any transactional operations. However, the missing authorization check allows any authenticated user or potentially unauthenticated attacker to exploit the payment processing endpoints and manipulate membership status or payment information. This type of vulnerability aligns with CWE-285, which specifically addresses insufficient authorization issues in software systems, where the application fails to properly enforce access controls for protected resources.
The operational impact of this vulnerability extends beyond simple unauthorized access to potentially compromise the entire membership management system. Attackers could exploit this weakness to create fraudulent memberships, modify existing user accounts, process unauthorized transactions, or even gain deeper access to the underlying WordPress installation through the compromised membership plugin. The financial implications are particularly severe as the vulnerability directly affects payment processing capabilities, potentially allowing attackers to bypass payment requirements or manipulate transaction records. This type of authorization bypass vulnerability also aligns with ATT&CK technique T1078 which covers legitimate credentials usage, where attackers leverage valid user permissions to perform unauthorized actions within systems.
Organizations using the affected versions of Paid Memberships Pro CCBill Gateway should immediately implement mitigations to address this vulnerability. The primary recommendation involves upgrading to the latest version of the plugin where the authorization checks have been properly implemented and tested. Security administrators should also conduct thorough access control reviews to ensure that only authorized personnel can perform membership management operations and payment processing tasks. Network monitoring should be enhanced to detect any suspicious activities related to membership transactions or unauthorized access attempts. Additionally, implementing proper logging and audit trails for all membership-related operations will help identify any exploitation attempts. The vulnerability serves as a reminder of the critical importance of proper authorization implementation in payment processing systems and highlights the need for regular security assessments of third-party plugins that handle sensitive financial transactions. Organizations should also consider implementing additional security layers such as web application firewalls and multi-factor authentication for administrative access to prevent exploitation of similar authorization bypass vulnerabilities in their membership management infrastructure.