CVE-2024-8788 in EU UK VAT Manager for WooCommerce Plugin
Summary
by MITRE • 09/28/2024
The EU/UK VAT Manager for WooCommerce plugin for WordPress is vulnerable to Reflected Cross-Site Scripting due to the use of add_query_arg without appropriate escaping on the URL in all versions up to, and including, 2.12.11. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
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Analysis
by VulDB Data Team • 03/09/2025
The CVE-2024-8788 vulnerability affects the EU/UK VAT Manager for WooCommerce plugin, a widely used WordPress extension that handles VAT calculations and compliance for online stores. This plugin integrates with the WooCommerce platform to manage tax-related operations for businesses operating within the European Union and United Kingdom markets. The vulnerability exists in versions up to and including 2.12.11, representing a critical security flaw that could compromise the integrity of affected WordPress installations. The issue stems from improper handling of URL parameters within the plugin's codebase, creating an avenue for malicious actors to execute harmful scripts on user browsers.
The technical flaw manifests in the plugin's use of the add_query_arg function without adequate escaping mechanisms when processing URL parameters. This reflected cross-site scripting vulnerability occurs because the plugin fails to sanitize input data before incorporating it into dynamically generated URLs. When users navigate to pages that utilize these vulnerable query parameters, the malicious scripts embedded in the URLs execute in the context of the victim's browser session. The vulnerability is classified as CWE-79 - Improper Neutralization of Input During Web Page Generation, which specifically addresses the improper handling of user-supplied data in web applications. This weakness allows attackers to inject malicious payloads that can be executed by other users who visit affected pages.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform various malicious activities through the compromised user sessions. Unauthenticated attackers can craft malicious URLs that, when clicked by unsuspecting users, would execute scripts such as cookie theft, session hijacking, or redirection to malicious websites. The vulnerability affects all users of the affected plugin version, regardless of their authentication status, making it particularly dangerous in environments where administrators and customers may inadvertently click on compromised links. This could lead to unauthorized access to customer data, financial fraud, or complete compromise of the WordPress installation through secondary attacks that exploit the authenticated sessions.
Mitigation strategies for CVE-2024-8788 should prioritize immediate plugin updates to the latest available version that addresses the vulnerability. Administrators should also implement web application firewalls that can detect and block suspicious query parameters, though this approach is less reliable than patching the underlying issue. Input validation and output escaping mechanisms should be strengthened throughout the WordPress environment, particularly in areas where URL parameters are processed. The vulnerability aligns with ATT&CK technique T1566.001 - Phishing: Spearphishing Attachment, as attackers may craft malicious links that appear legitimate but contain XSS payloads. Organizations should also conduct thorough security audits of their WordPress installations to identify other potential XSS vulnerabilities and implement proper content security policies to limit the impact of any successful attacks. Regular security monitoring and user education about suspicious links remain essential defensive measures against this type of attack vector.