CVE-2025-7866 is a cross-site scripting (XSS) vulnerability identified in Portabilis i-Educar version 2.9.0, specifically within the Disabilities Module's file /intranet/educar_deficiencia_lst.php. The vulnerability arises from improper handling of the input parameter 'Deficiência ou Transtorno', which allows an attacker to inject malicious scripts that are then executed in the context of the victim's browser. This type of vulnerability is classified as reflected or stored XSS depending on how the input is processed and rendered. The vulnerability can be exploited remotely without requiring authentication, although user interaction is necessary (e.g., the victim must visit a crafted URL or interact with malicious content). The CVSS 4.0 score is 5.1 (medium severity), reflecting the moderate impact on confidentiality and integrity, with no impact on availability. The vulnerability does not require privileges but does require user interaction. The vendor was notified but did not respond, and no patches are currently available. Although no known exploits are reported in the wild, the public disclosure of the vulnerability increases the risk of exploitation. XSS vulnerabilities can lead to session hijacking, credential theft, defacement, or redirection to malicious sites, posing significant risks especially in educational environments where sensitive student data may be accessible.

For European organizations using Portabilis i-Educar 2.9.0, particularly educational institutions and administrative bodies managing disabilities data, this vulnerability poses a risk of unauthorized access to sensitive information through session hijacking or theft of authentication tokens. The exploitation could lead to privacy violations under GDPR, reputational damage, and potential regulatory penalties. Since the vulnerability affects a module handling disabilities information, the exposure of such sensitive personal data could have severe legal and ethical consequences. Additionally, attackers could use the XSS flaw to deliver malware or phishing content to users, increasing the risk of broader compromise within the organization. The medium severity rating suggests a moderate but tangible threat that should be addressed promptly to avoid escalation or chaining with other vulnerabilities.

Given the lack of an official patch, European organizations should implement immediate compensating controls. These include input validation and output encoding on the affected parameter to neutralize malicious scripts. Web Application Firewalls (WAFs) should be configured to detect and block typical XSS attack patterns targeting the Disabilities Module. Organizations should conduct thorough code reviews and consider temporary disabling or restricting access to the vulnerable module if feasible. User awareness training should emphasize caution when clicking on unsolicited links or interacting with unexpected content. Monitoring and logging of web application traffic should be enhanced to detect potential exploitation attempts. Finally, organizations should maintain close communication with Portabilis for updates and apply official patches as soon as they become available.