CVE-2025-48345 is a high-severity reflected Cross-Site Scripting (XSS) vulnerability identified in the arisoft Contact Form 7 Editor Button plugin, affecting versions up to 1.0.0. This vulnerability arises due to improper neutralization of user-supplied input during web page generation, classified under CWE-79. Specifically, the plugin fails to adequately sanitize or encode input parameters before reflecting them in the web page, allowing an attacker to inject malicious scripts that execute in the context of the victim's browser. The CVSS 3.1 base score of 7.1 reflects the vulnerability's characteristics: it is remotely exploitable over the network (AV:N), requires no privileges (PR:N), but does require user interaction (UI:R) such as clicking a crafted link or submitting a malicious form. The scope is changed (S:C), indicating that exploitation can affect resources beyond the vulnerable component, impacting confidentiality, integrity, and availability to a limited extent (C:L/I:L/A:L). Although no known exploits are currently reported in the wild, the vulnerability poses a significant risk because attackers can leverage it to execute arbitrary JavaScript, potentially stealing session cookies, performing actions on behalf of authenticated users, or delivering further payloads. The plugin is commonly used to enhance Contact Form 7, a popular WordPress form plugin, by adding editor button functionality, meaning that websites running WordPress with this plugin installed are at risk if unpatched. The lack of available patches at the time of publication necessitates immediate attention from site administrators.

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on WordPress websites with the arisoft Contact Form 7 Editor Button plugin installed. Exploitation could lead to session hijacking, unauthorized actions on websites, defacement, or phishing attacks targeting site visitors. This can result in reputational damage, loss of customer trust, and potential regulatory consequences under GDPR if personal data is compromised. Additionally, attackers could use the vulnerability as a foothold to pivot into internal networks if the affected websites are integrated with backend systems. Given the widespread use of WordPress in Europe across sectors such as e-commerce, education, and public services, the risk extends to a broad range of organizations. The requirement for user interaction means that social engineering or phishing campaigns could be used to trigger the exploit, increasing the attack surface. Although the vulnerability does not require authentication, the scope change indicates that the impact could extend beyond the immediate website, potentially affecting connected services or users.

European organizations should take immediate steps to mitigate this vulnerability. First, they should identify all WordPress instances using the arisoft Contact Form 7 Editor Button plugin and assess the version in use. Since no official patch is currently available, organizations should consider temporarily disabling or uninstalling the plugin to eliminate the attack vector. Implementing Web Application Firewalls (WAFs) with custom rules to detect and block malicious input patterns targeting this vulnerability can provide interim protection. Additionally, organizations should enforce Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Educating users and administrators about the risks of clicking suspicious links or submitting untrusted forms can reduce the likelihood of successful exploitation. Monitoring web server logs for unusual request patterns and anomalous user behavior can help detect attempted attacks. Finally, organizations should subscribe to vendor updates and security advisories to apply patches promptly once released.