CVE-2025-62903 identifies a Stored Cross-site Scripting (XSS) vulnerability in the WPC Smart Messages plugin for WooCommerce, specifically versions up to and including 4.2.4. The vulnerability stems from improper neutralization of input during web page generation, which allows an attacker to inject malicious scripts that are stored and later executed in the context of users visiting affected pages. This type of vulnerability can be exploited when an attacker with low privileges submits crafted input that is not properly sanitized or encoded before being rendered in web pages. The CVSS 3.1 base score of 5.4 indicates a medium severity, with an attack vector of network (remote), low attack complexity, requiring low privileges, and user interaction. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component. The impact affects confidentiality and integrity partially, with no impact on availability. No known exploits have been reported in the wild as of the publication date. The vulnerability is significant for e-commerce sites using WooCommerce with this plugin, as it could allow attackers to execute scripts that steal session tokens, perform actions on behalf of users, or manipulate displayed content, potentially damaging customer trust and data security.

For European organizations, especially those operating e-commerce platforms using WooCommerce with the WPC Smart Messages plugin, this vulnerability poses a risk of client-side script injection leading to theft of sensitive customer information such as session cookies or personal data. It can also enable attackers to perform unauthorized actions on behalf of users, potentially leading to fraudulent transactions or reputational damage. The partial confidentiality and integrity impact could undermine customer trust and compliance with data protection regulations like GDPR. Although availability is not affected, the indirect consequences of data leakage or manipulation can be severe. The requirement for user interaction limits automated exploitation but does not eliminate risk, particularly in environments with high traffic and diverse user bases. Organizations relying on this plugin for customer engagement should consider the risk of targeted attacks aiming to exploit this vulnerability to compromise user accounts or inject misleading content.

1. Monitor official WPClever channels and Patchstack for the release of a security patch addressing CVE-2025-62903 and apply updates immediately upon availability. 2. Until a patch is released, implement strict input validation and output encoding on all user-supplied data that is rendered in messages, using security libraries or frameworks that enforce context-aware escaping. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4. Limit user privileges to the minimum necessary to reduce the risk of malicious input submission. 5. Conduct regular security audits and penetration testing focusing on input handling in customer-facing message features. 6. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content. 7. Use Web Application Firewalls (WAF) with rules targeting XSS attack patterns to provide an additional layer of defense. 8. Review and harden WooCommerce and WordPress security configurations to minimize attack surface.