CVE-2025-47504 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79, affecting the WPFactory Custom Checkout Fields for WooCommerce plugin. This vulnerability arises due to improper neutralization of input during web page generation, allowing malicious actors to inject and store arbitrary scripts within the custom checkout fields. When these fields are rendered in the web interface, the malicious scripts execute in the context of the victim's browser. The affected versions include all versions up to 1.8.3. The vulnerability requires an attacker with at least low privileges (PR:L) and some user interaction (UI:R) to exploit, but it can lead to a complete compromise of user session integrity, data confidentiality, and availability of the affected WooCommerce checkout pages. The CVSS v3.1 base score is 6.5, indicating a medium severity level. The attack vector is network-based (AV:N), and the scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. Although no known exploits are currently in the wild, the vulnerability's nature makes it a significant risk for e-commerce sites using this plugin, as stored XSS can facilitate session hijacking, credential theft, defacement, or distribution of malware to customers. The lack of available patches at the time of publication increases the urgency for mitigation.

For European organizations, particularly those operating e-commerce platforms using WooCommerce with the WPFactory Custom Checkout Fields plugin, this vulnerability poses a substantial risk. Exploitation can lead to unauthorized access to customer data, including personally identifiable information (PII) and payment details, violating GDPR requirements and potentially resulting in regulatory penalties. The stored XSS can also damage brand reputation and customer trust, leading to financial losses. Additionally, attackers could leverage this vulnerability to perform phishing attacks or distribute malware, amplifying the threat landscape. Given the interconnected nature of European digital commerce, a successful attack could have cascading effects on supply chains and partner networks. The medium severity score reflects the need for prompt attention, especially since the scope of impact extends beyond the plugin itself to the broader WooCommerce environment and its users.

1. Immediate mitigation should focus on restricting user input in custom checkout fields by implementing strict input validation and sanitization on both client and server sides. 2. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts. 3. Monitor and audit all custom field inputs for suspicious content and implement Web Application Firewall (WAF) rules to detect and block exploit attempts targeting this vulnerability. 4. Limit privileges of users who can add or modify checkout fields to reduce the risk of malicious input. 5. Regularly update the WPFactory Custom Checkout Fields plugin as soon as a security patch is released. 6. Conduct security awareness training for administrators managing WooCommerce plugins to recognize and respond to suspicious activities. 7. Use security plugins or services that scan for XSS vulnerabilities and anomalous behavior in real-time. 8. Consider temporarily disabling the Custom Checkout Fields plugin if immediate patching is not feasible and the risk is deemed high.