CVE-2025-64291 identifies a stored cross-site scripting vulnerability in the Premmerce User Roles WordPress plugin, versions up to and including 1.0.13. The vulnerability arises from improper neutralization of input during web page generation, allowing malicious scripts to be injected and persistently stored within the application. When other users or administrators access the affected pages, the malicious scripts execute in their browsers under the context of the vulnerable site. This can lead to theft of authentication cookies, session tokens, or other sensitive information, as well as unauthorized actions such as privilege escalation or data manipulation. The plugin is commonly used to manage user roles in WordPress-based e-commerce sites, making it a valuable target for attackers seeking to compromise site integrity or user accounts. Although no public exploits have been reported, the vulnerability is publicly disclosed and thus increases the risk of exploitation. The lack of a CVSS score requires an assessment based on the nature of stored XSS, which typically has a high impact on confidentiality and integrity, moderate impact on availability, and does not require user authentication for exploitation if the input vector is publicly accessible. The vulnerability demands timely remediation to prevent potential attacks.

For European organizations, especially those operating e-commerce platforms or content management systems based on WordPress with the Premmerce User Roles plugin, this vulnerability could lead to significant security breaches. Attackers exploiting this stored XSS could hijack user sessions, steal sensitive customer data, or perform unauthorized administrative actions, undermining trust and potentially violating GDPR requirements concerning data protection. The impact extends to reputational damage, financial loss due to fraud or downtime, and legal consequences from data breaches. Organizations with high volumes of user interactions or administrative users are at greater risk. Since the vulnerability allows persistent script injection, it can affect multiple users over time, amplifying the potential damage. The absence of known exploits currently provides a window for proactive defense, but the public disclosure increases the likelihood of future attacks targeting European entities.

European organizations should immediately inventory their WordPress installations to identify the use of Premmerce User Roles plugin versions up to 1.0.13. Until a patch is released, implement strict input validation and output encoding on all user-supplied data fields related to user roles or any plugin-managed inputs. Employ a web application firewall (WAF) with rules designed to detect and block XSS payloads targeting WordPress plugins. Conduct regular security audits and penetration testing focusing on stored XSS vectors. Educate administrators and users about the risks of clicking suspicious links or executing unexpected scripts. Monitor logs for unusual activity indicative of XSS exploitation attempts. Once a security update or patch is available from Premmerce, apply it promptly. Additionally, consider implementing Content Security Policy (CSP) headers to restrict script execution sources, reducing the impact of potential XSS attacks. Backup website data regularly to enable quick recovery if compromise occurs.