CVE-2025-53575 is a high-severity reflected Cross-site Scripting (XSS) vulnerability affecting Primer MyData for Woocommerce, a plugin used in Woocommerce-based e-commerce platforms. The vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79. Specifically, the plugin fails to adequately sanitize user-supplied input before reflecting it back in web pages, enabling attackers to inject malicious scripts. This reflected XSS can be triggered remotely without authentication (AV:N/PR:N), requiring only user interaction (UI:R), and can affect the confidentiality, integrity, and availability of the affected system (C:L/I:L/A:L). The vulnerability has a CVSS 3.1 base score of 7.1, indicating a high risk. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. Although no known exploits are currently reported in the wild, the ease of exploitation and the widespread use of Woocommerce make this a significant threat. Attackers could leverage this vulnerability to execute arbitrary JavaScript in the context of the victim's browser, potentially stealing session cookies, performing actions on behalf of the user, or delivering further malware payloads. The affected versions include all versions up to 4.2.5, with no patch links currently available, indicating that users should be vigilant for updates or apply temporary mitigations.

For European organizations, especially those operating e-commerce platforms using Woocommerce with the Primer MyData plugin, this vulnerability poses a substantial risk. Exploitation could lead to customer data theft, session hijacking, and unauthorized transactions, damaging both customer trust and regulatory compliance standing under GDPR. The reflected XSS could be used to target employees or customers, potentially leading to broader network compromise if internal users are targeted. The impact extends to brand reputation and financial losses due to fraud or remediation costs. Given the interconnected nature of European markets and the emphasis on data protection, such vulnerabilities could attract regulatory scrutiny and fines. Additionally, the vulnerability's ability to affect availability could disrupt online sales operations, impacting revenue streams.

Organizations should immediately audit their use of the Primer MyData for Woocommerce plugin and identify affected versions (up to 4.2.5). Until an official patch is released, implement Web Application Firewall (WAF) rules to detect and block reflected XSS attack patterns targeting the plugin's endpoints. Employ Content Security Policy (CSP) headers to restrict script execution origins, reducing the impact of injected scripts. Sanitize and validate all user inputs rigorously at the application level, especially those reflected in responses. Monitor web logs for suspicious requests indicative of XSS attempts. Educate users and administrators about the risks of clicking on untrusted links that could exploit this vulnerability. Once a patch becomes available, prioritize prompt application. Additionally, consider isolating or disabling the plugin if it is not critical to operations to reduce the attack surface.