CVE-2025-66107 identifies a missing authorization vulnerability in the Scott Paterson Subscriptions & Memberships for PayPal plugin, specifically affecting versions up to 1.1.7. This vulnerability arises from incorrectly configured access control security levels, which fail to properly restrict user permissions. As a result, unauthorized users may perform actions reserved for privileged roles, such as modifying subscription details, accessing membership data, or manipulating payment-related information. The plugin is commonly used in WordPress environments to manage subscription-based services integrated with PayPal payment processing. Although no exploits are currently reported in the wild, the nature of the vulnerability indicates that attackers could leverage it to compromise the confidentiality and integrity of subscription data. The absence of a CVSS score suggests that the vulnerability has not yet been fully assessed, but the missing authorization flaw typically represents a critical security weakness. This vulnerability does not require user interaction but does depend on the attacker’s ability to interact with the plugin interface, which is often exposed on public-facing websites. The lack of patch links indicates that a fix may not yet be publicly available, emphasizing the need for immediate attention from affected organizations. The vulnerability was published on November 21, 2025, by Patchstack, highlighting its recent discovery and the importance of timely mitigation.

For European organizations, this vulnerability poses significant risks to e-commerce and membership platforms that utilize the Scott Paterson Subscriptions & Memberships for PayPal plugin. Unauthorized access could lead to manipulation of subscription statuses, unauthorized access to customer payment information, and potential financial fraud. This could result in reputational damage, regulatory non-compliance (especially under GDPR due to exposure of personal data), and financial losses. The impact on availability is less direct but could occur if attackers disrupt subscription services or cause denial of service through unauthorized actions. Given the integration with PayPal, any compromise could also affect payment processing integrity, leading to broader operational disruptions. Organizations relying heavily on subscription revenue models or managing sensitive customer data are particularly vulnerable. The threat is amplified in sectors such as retail, digital services, and membership-based organizations prevalent across Europe.

1. Monitor the vendor’s official channels for patches or updates addressing CVE-2025-66107 and apply them promptly once available. 2. Conduct an immediate audit of access control configurations within the Subscriptions & Memberships for PayPal plugin to ensure that permissions are correctly set and that no unauthorized roles have elevated privileges. 3. Implement strict role-based access controls (RBAC) and limit administrative access to trusted personnel only. 4. Employ web application firewalls (WAF) with custom rules to detect and block suspicious requests targeting subscription management endpoints. 5. Regularly review logs for unusual activity related to subscription modifications or access attempts. 6. Consider temporarily disabling the plugin or restricting its functionality if a patch is not yet available and the risk is deemed high. 7. Educate administrators and developers about secure plugin configuration and the risks of missing authorization vulnerabilities. 8. Ensure that PayPal integration credentials and API keys are securely stored and rotated regularly to minimize risk in case of compromise.