CVE-2025-64220 is a stored Cross-site Scripting (XSS) vulnerability affecting ReyCommerce Rey Core, a component used in e-commerce platforms. The vulnerability stems from improper neutralization of input during web page generation, which allows malicious actors to inject and store arbitrary JavaScript code within the application. When other users access the affected pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim. The vulnerability affects all versions up to and including 3.1.8. The CVSS v3.1 score of 6.5 reflects a medium severity level, with an attack vector of network (remote exploitation), low attack complexity, requiring low privileges and user interaction, and with a scope change indicating that the vulnerability affects components beyond the initially vulnerable module. The impact includes partial loss of confidentiality, integrity, and availability. No known public exploits or patches are currently available, but the vulnerability is published and should be addressed promptly. Stored XSS is particularly dangerous in e-commerce contexts as it can compromise customer data and trust, potentially leading to financial and reputational damage.

For European organizations, especially those operating e-commerce platforms using ReyCommerce Rey Core, this vulnerability poses significant risks. Exploitation could lead to unauthorized access to user sessions, theft of sensitive customer information such as payment details, and manipulation of web content, which can damage brand reputation and customer trust. The partial loss of confidentiality and integrity can also facilitate further attacks, including phishing or malware distribution. Given the interconnected nature of European markets and strict data protection regulations like GDPR, a breach resulting from this vulnerability could lead to regulatory penalties and legal consequences. The availability impact, while limited, could disrupt user experience and sales. Organizations relying on ReyCommerce Rey Core must prioritize remediation to maintain compliance and protect their customers.

1. Monitor ReyCommerce vendor communications closely for official patches or updates addressing CVE-2025-64220 and apply them immediately upon release. 2. Implement strict input validation on all user-supplied data, ensuring that potentially malicious characters are sanitized or rejected before storage or rendering. 3. Employ robust output encoding strategies, particularly HTML entity encoding, when displaying user-generated content to prevent script execution. 4. Deploy Content Security Policies (CSP) to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 5. Conduct regular security audits and penetration testing focused on input handling and output rendering within ReyCommerce Rey Core implementations. 6. Educate developers and administrators on secure coding practices related to input sanitization and XSS prevention. 7. Use web application firewalls (WAFs) with rules tailored to detect and block XSS attack patterns targeting ReyCommerce platforms. 8. Encourage users to report suspicious activities and maintain awareness campaigns to reduce the risk of social engineering attacks that may leverage this vulnerability.