CVE-2025-64198 identifies a reflected Cross-site Scripting (XSS) vulnerability in the Easy Social Share Buttons plugin developed by appscreo, affecting all versions prior to 10.7.1. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing attackers to inject malicious JavaScript code into web pages dynamically generated by the plugin. When a victim interacts with a crafted URL containing malicious payloads, the injected script executes in the victim's browser context, potentially leading to session hijacking, credential theft, or unauthorized actions on behalf of the user. The CVSS v3.1 score of 7.1 reflects a high severity due to the network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is changed (S:C), indicating that exploitation can affect resources beyond the vulnerable component. The vulnerability impacts confidentiality, integrity, and availability (C:L/I:L/A:L), meaning partial loss of these security properties is possible. Although no public exploits are currently known, the widespread use of Easy Social Share Buttons in WordPress sites increases the attack surface. The vulnerability is particularly dangerous for websites that rely on this plugin for social media integration, as attackers can leverage it to compromise user sessions or deliver further malware. The lack of patch links suggests that users must monitor vendor communications closely for updates. The vulnerability was reserved on October 29, 2025, and published on November 6, 2025, indicating recent disclosure.

For European organizations, this vulnerability poses a significant risk to websites using the Easy Social Share Buttons plugin, especially those handling sensitive user data or financial transactions. Successful exploitation can lead to theft of user credentials, session tokens, or personal information, undermining user trust and potentially violating GDPR requirements regarding data protection. The reflected XSS can also be used to deliver malware or redirect users to phishing sites, increasing the risk of broader compromise. Organizations in sectors such as e-commerce, finance, healthcare, and government are particularly vulnerable due to the potential impact on confidentiality and integrity. Additionally, website defacement or service disruption could harm brand reputation and result in financial losses. The requirement for user interaction means social engineering campaigns could be employed to increase exploitation success. Given the plugin’s popularity in WordPress ecosystems, the scale of affected systems in Europe could be substantial, amplifying the threat landscape.

European organizations should immediately verify if their websites use the Easy Social Share Buttons plugin and identify the version in use. The primary mitigation is to upgrade to version 10.7.1 or later, where the vulnerability is fixed. In the absence of an official patch, organizations should consider temporarily disabling the plugin or removing it if not critical. Implementing strict input validation and sanitization on all user-supplied data can reduce the risk of injection attacks. Deploying Content Security Policy (CSP) headers can help mitigate the impact of XSS by restricting script execution sources. Web Application Firewalls (WAFs) should be configured to detect and block malicious payloads targeting this vulnerability. Regular security audits and penetration testing focused on XSS vectors are recommended. User awareness training to recognize suspicious links and social engineering attempts can reduce successful exploitation. Monitoring web server logs and user activity for anomalies related to this vulnerability is also advised. Finally, organizations should subscribe to vendor and security mailing lists to receive timely updates and patches.