CVE-2025-64191 is a reflected Cross-site Scripting (XSS) vulnerability identified in the 8theme XStore WordPress theme, affecting all versions prior to 9.6.1. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, allowing attackers to inject malicious JavaScript code that is reflected back to users without adequate sanitization. This flaw enables attackers to craft malicious URLs or input fields that, when visited or submitted by a victim, execute arbitrary scripts in the victim's browser context. The CVSS v3.1 score of 7.1 reflects a high severity, with an attack vector over the network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. The impact affects confidentiality, integrity, and availability to a limited extent (C:L/I:L/A:L), potentially allowing attackers to steal session cookies, manipulate page content, or cause denial of service. No known exploits have been reported in the wild yet, but the vulnerability is publicly disclosed and patched in version 9.6.1. The lack of patch links in the provided data suggests organizations should verify updates directly from the vendor or trusted repositories. The vulnerability is particularly relevant for websites using the XStore theme, which is popular among e-commerce and business sites built on WordPress. Attackers could leverage this vulnerability to conduct phishing, session hijacking, or defacement attacks, undermining user trust and potentially leading to data breaches or financial loss.

For European organizations, especially those operating e-commerce platforms or business websites using the XStore theme, this vulnerability poses a significant risk. Successful exploitation can lead to theft of user credentials, session tokens, or other sensitive information, enabling further compromise of user accounts or administrative access. The reflected XSS can also facilitate phishing attacks by injecting malicious content that appears legitimate, damaging brand reputation and customer trust. Additionally, attackers might manipulate website content or cause service disruptions, impacting availability and business continuity. Given the widespread use of WordPress and the popularity of the XStore theme in Europe, particularly among SMEs and online retailers, the potential impact includes financial losses, regulatory penalties under GDPR for data breaches, and erosion of customer confidence. The requirement for user interaction means social engineering could be employed to increase success rates. The vulnerability's network-exploitable nature means attackers can target organizations remotely without authentication, increasing the attack surface.

Organizations should immediately verify the version of the XStore theme in use and upgrade to version 9.6.1 or later where the vulnerability is patched. If immediate upgrade is not feasible, implement Web Application Firewall (WAF) rules to detect and block typical XSS attack patterns targeting the affected parameters. Employ strict input validation and output encoding on all user-supplied data to prevent script injection. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. Conduct security awareness training to educate users about the risks of clicking suspicious links, as exploitation requires user interaction. Regularly scan websites with automated tools to detect XSS vulnerabilities and monitor logs for suspicious activities. Engage with the theme vendor or trusted security advisories to obtain official patches and guidance. Finally, ensure incident response plans are updated to handle potential XSS exploitation scenarios.