CVE-2025-41070 is a reflected Cross-site Scripting (XSS) vulnerability classified under CWE-79 affecting all versions of Sanoma's Clickedu platform, a widely used educational management system. The vulnerability exists in the '/students/carpetes_varies.php' endpoint, where user-supplied input is improperly sanitized and directly reflected in the HTTP response. This flaw allows an attacker to craft a malicious URL containing JavaScript code that executes in the context of the victim's browser when the URL is accessed. The attack vector is network-based, requiring no privileges or authentication but does require user interaction to click the malicious link. Successful exploitation can lead to session hijacking, theft of sensitive information, or unauthorized actions performed with the victim's privileges. The CVSS 4.0 vector indicates low attack complexity and no privileges required, but user interaction is necessary. The vulnerability has a medium severity rating with a CVSS score of 4.8. No patches or known exploits are currently available, but the risk remains significant due to the potential impact on confidentiality and integrity of user data. The vulnerability is particularly concerning for educational institutions relying on Clickedu for student and administrative management, as it could compromise sensitive student data and disrupt operations.

For European organizations, especially educational institutions using Clickedu, this vulnerability poses a risk of data theft and unauthorized actions. Attackers could steal session cookies to impersonate users, potentially gaining access to sensitive student records, grades, or personal information. This could lead to privacy violations under GDPR and damage institutional reputation. The reflected XSS could also be used to deliver further malware or phishing attacks targeting staff, students, or parents. The medium severity score reflects moderate risk, but the widespread use of Clickedu in Europe amplifies potential impact. Disruption of educational services or data breaches could have regulatory and operational consequences. Since exploitation requires user interaction, social engineering campaigns could target European users to maximize impact. The lack of patches increases exposure time, making timely mitigation critical.

Organizations should implement strict input validation and output encoding on the affected endpoint to neutralize malicious scripts. Employ Content Security Policy (CSP) headers to restrict script execution sources and reduce XSS impact. Educate users to recognize and avoid suspicious links, especially those received via email or messaging platforms. Monitor web application logs for unusual URL patterns or repeated requests to the vulnerable endpoint. Since no official patch is currently available, consider deploying web application firewalls (WAFs) with custom rules to detect and block XSS payloads targeting '/students/carpetes_varies.php'. Coordinate with Sanoma for timely updates and apply patches immediately upon release. Conduct security awareness training focused on phishing and social engineering to reduce successful exploitation likelihood. Regularly review and update security controls to maintain defense-in-depth.