CVE-2024-33944 in WooCommerce AWeber Newsletter Subscription Plugin
Summary
by MITRE • 05/02/2024
Missing Authorization vulnerability in Kestrel WooCommerce AWeber Newsletter Subscription.This issue affects WooCommerce AWeber Newsletter Subscription: from n/a through 4.0.1.
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Analysis
by VulDB Data Team • 05/02/2024
The vulnerability identified as CVE-2024-33944 represents a critical missing authorization flaw within the Kestrel WooCommerce AWeber Newsletter Subscription plugin, specifically impacting versions ranging from an unspecified initial state through version 4.0.1. This type of vulnerability falls under the CWE-862 category, which defines "Missing Authorization" as a weakness where a system fails to properly verify that an operation is authorized before executing it. The affected plugin serves as an integration bridge between WooCommerce e-commerce platforms and AWeber email marketing services, facilitating newsletter subscription management for online stores. The vulnerability arises from insufficient access control mechanisms that allow unauthorized users to perform administrative actions typically restricted to authenticated administrators. This misconfiguration creates a pathway for malicious actors to exploit the plugin's functionality without proper authentication, potentially enabling them to manipulate subscription lists, modify plugin settings, or execute unauthorized operations within the WooCommerce environment. The issue particularly impacts WordPress-based e-commerce sites that rely on the AWeber integration for customer communication and marketing automation, creating a significant security risk for businesses handling sensitive customer data and transactional information.
The technical implementation of this vulnerability stems from the plugin's failure to validate user permissions before processing requests to modify newsletter subscription configurations or access administrative interfaces. Attackers can exploit this weakness by crafting malicious requests that bypass normal authentication checks, potentially gaining access to sensitive data or functionality within the plugin's administrative panel. The vulnerability's impact extends beyond simple unauthorized access as it can enable attackers to manipulate customer subscription data, potentially leading to spam distribution or data exfiltration. The lack of proper authorization checks means that any user, whether authenticated or not, can potentially invoke administrative functions through the plugin's API endpoints or direct URL access patterns. This flaw particularly affects the plugin's ability to enforce role-based access controls, where only users with appropriate administrative privileges should be able to modify subscription settings or access sensitive configuration parameters. The vulnerability's persistence across multiple versions indicates a fundamental design flaw in the authorization mechanism rather than a simple coding error, suggesting that the plugin's security model fails to properly implement standard access control patterns.
The operational impact of this vulnerability creates substantial risk for WooCommerce store owners and their customers, as unauthorized individuals could potentially gain control over email marketing automation systems that often contain sensitive customer information. Attackers exploiting this vulnerability might manipulate subscription lists to include malicious email addresses, create spam campaigns, or even gain access to customer contact information that could be used for further attacks. The compromised plugin interface could also serve as a stepping stone for more extensive attacks against the broader WordPress installation, as the attacker gains access to administrative functions that might reveal additional system vulnerabilities. Organizations relying on the affected plugin could face reputational damage from unauthorized email campaigns, potential regulatory violations related to data protection, and increased risk of downstream attacks that leverage the compromised administrative access. The vulnerability's presence in the plugin ecosystem also indicates potential exposure across multiple WooCommerce installations, creating a widespread security concern for businesses that have not yet updated to patched versions or implemented additional mitigations.
Organizations should immediately implement multiple layers of defense to address this vulnerability while awaiting official patches from the plugin developers. The recommended mitigation strategies include applying the latest available security updates from the plugin vendor, implementing additional access controls through WordPress security plugins, and monitoring administrative access logs for suspicious activities. Network-level protections such as web application firewalls should be configured to monitor and block unauthorized access attempts to the plugin's administrative interfaces. Security teams should also conduct comprehensive audits of their WooCommerce installations to identify any other plugins or components that might share similar authorization flaws, as this vulnerability type often indicates broader architectural security issues. The implementation of principle of least privilege access controls and regular security assessments of third-party plugins can help prevent similar vulnerabilities from being exploited in the future. Organizations should also consider implementing automated monitoring solutions that can detect unauthorized modifications to subscription lists or administrative settings, providing early warning capabilities for potential exploitation attempts. According to ATT&CK framework, this vulnerability maps to T1078 Valid Accounts and T1566 Phishing techniques, as attackers may leverage the compromised administrative access to conduct further social engineering campaigns or establish persistent access to the broader system.