CVE-2025-49042 is a stored cross-site scripting (XSS) vulnerability classified under CWE-79, affecting Automattic's WooCommerce plugin for WordPress, specifically versions up to 10.0.2. The vulnerability stems from improper neutralization of input during web page generation, allowing malicious scripts to be stored and later executed in the context of users viewing affected pages. This type of XSS can enable attackers to hijack user sessions, deface websites, or perform actions on behalf of authenticated users. The CVSS 3.1 base score is 5.9 (medium), reflecting that exploitation requires network access, low attack complexity, high privileges, and user interaction, with a scope change. The vulnerability impacts confidentiality, integrity, and availability to a limited extent. No public exploits are known at this time, but the vulnerability is publicly disclosed and should be addressed promptly. WooCommerce is widely used in e-commerce, making this vulnerability relevant for online stores relying on this plugin. The lack of an official patch link suggests that a fix may be pending or in development. The vulnerability's requirement for authenticated access and user interaction reduces its exploitation likelihood but does not eliminate risk, especially in environments with multiple users or administrators.

For European organizations, this vulnerability poses a risk primarily to e-commerce platforms using WooCommerce. Exploitation could lead to session hijacking, unauthorized actions, or data exposure within the affected web application, potentially damaging customer trust and causing financial loss. The impact on confidentiality includes potential leakage of user credentials or personal data. Integrity could be compromised by unauthorized content modification or fraudulent transactions. Availability impact is limited but could manifest through defacement or disruption of user experience. Given the widespread use of WooCommerce in Europe, especially among small to medium enterprises, the threat could affect a broad range of businesses. The requirement for authenticated access and user interaction means insider threats or compromised accounts are the most likely exploitation vectors. Regulatory implications under GDPR may arise if personal data is exposed or manipulated, increasing the compliance risk for affected organizations.

Organizations should immediately audit their WooCommerce installations to identify affected versions and plan for updates once patches are released. In the interim, implement strict input validation and sanitization on all user inputs, especially those that are stored and rendered in web pages. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Limit administrative and high-privilege user accounts to reduce the risk of exploitation. Monitor logs for unusual activities indicative of XSS attempts or successful exploitation. Educate users and administrators about phishing and social engineering risks that could facilitate user interaction required for exploitation. Consider deploying Web Application Firewalls (WAFs) with rules targeting XSS payloads specific to WooCommerce. Regularly back up website data and configurations to enable quick recovery in case of compromise. Finally, stay informed about official patches or updates from Automattic and apply them promptly.