CVE-2025-48351 is a high-severity vulnerability classified as CWE-352, indicating a Cross-Site Request Forgery (CSRF) issue in the PluginsPoint Kento Splash Screen plugin, affecting versions up to 1.4. The vulnerability allows an attacker to perform unauthorized actions on behalf of an authenticated user by exploiting the lack of proper CSRF protections. Specifically, this CSRF flaw enables Stored Cross-Site Scripting (XSS) attacks, where malicious scripts can be injected and persist within the application. The CVSS 3.1 base score of 7.1 reflects 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), meaning the vulnerability affects resources beyond the initially vulnerable component. The impact metrics indicate low confidentiality, integrity, and availability impacts individually, but combined they pose a significant risk. Stored XSS combined with CSRF can lead to session hijacking, credential theft, or execution of arbitrary scripts in the context of the victim's browser, potentially compromising user data and system integrity. No patches are currently linked, and no known exploits are reported in the wild as of the publication date (August 28, 2025).

For European organizations using the PluginsPoint Kento Splash Screen plugin, this vulnerability could lead to significant security risks. The Stored XSS enabled by CSRF can allow attackers to hijack user sessions, steal sensitive information, or perform unauthorized actions within the affected web applications. This is particularly concerning for organizations handling personal data under GDPR, as exploitation could lead to data breaches and regulatory penalties. The vulnerability's ability to change scope means that an attacker could potentially affect other components or services connected to the vulnerable plugin, increasing the risk of lateral movement within enterprise environments. Additionally, the requirement for user interaction (e.g., clicking a malicious link) means phishing campaigns could be used to exploit this vulnerability, which is a common attack vector in Europe. The lack of available patches increases the window of exposure, emphasizing the need for immediate mitigation. The impact extends to web applications relying on this plugin for splash screen functionality, which may be used in customer-facing portals, intranets, or other critical web services.

Given the absence of official patches, European organizations should implement multiple layers of defense. First, apply strict Content Security Policy (CSP) headers to limit the execution of unauthorized scripts and reduce the impact of Stored XSS. Second, implement anti-CSRF tokens in all forms and state-changing requests within the affected application to prevent unauthorized requests. Third, conduct thorough input validation and output encoding on all user-supplied data to mitigate XSS injection. Fourth, educate users about phishing risks and suspicious links to reduce the likelihood of user interaction exploitation. Additionally, consider temporarily disabling or replacing the Kento Splash Screen plugin until a vendor patch is released. Monitor web server and application logs for unusual activity indicative of exploitation attempts. Finally, maintain up-to-date backups and incident response plans to quickly recover from potential compromises.