CVE-2025-8508 is a cross-site scripting (XSS) vulnerability identified in version 2.9 of Portabilis i-Educar, an educational management system. The vulnerability resides in the file /intranet/educar_avaliacao_desempenho_cad.php, specifically in the handling of the parameters titulo_avaliacao and descricao. Improper input sanitization or encoding allows an attacker to inject malicious scripts into these parameters, which are then executed in the context of the victim's browser when viewing the affected page. The vulnerability can be exploited remotely without authentication, requiring only user interaction (e.g., clicking a crafted link or visiting a malicious page). The CVSS 4.0 base score is 5.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required, but user interaction needed. The impact on confidentiality is none, integrity impact is low due to possible script manipulation, and availability impact is none. The vendor was notified but did not respond or provide a patch, and public exploit details have been disclosed, increasing the risk of exploitation. This vulnerability could be leveraged to steal session cookies, perform actions on behalf of users, or conduct phishing attacks within the i-Educar intranet environment. Given that i-Educar is used primarily in educational institutions, the threat targets sensitive educational data and user accounts within these organizations.

For European organizations using Portabilis i-Educar 2.9, this XSS vulnerability poses a risk primarily to the confidentiality and integrity of user sessions and data. Exploitation could lead to unauthorized access to user accounts, session hijacking, and potential data manipulation within the educational management system. This could disrupt academic operations, compromise student and staff personal information, and damage institutional reputation. Since the vulnerability requires user interaction and is exploitable remotely, phishing campaigns targeting staff or students could be effective. The lack of vendor response and patch availability increases exposure time. Educational institutions in Europe that rely on i-Educar for managing evaluations and performance data are particularly vulnerable, potentially affecting data privacy compliance under GDPR if personal data is compromised. Additionally, attackers could use the vulnerability as a foothold to pivot to other internal systems if network segmentation is weak.

Organizations should implement specific mitigations beyond generic advice: 1) Immediately restrict access to the vulnerable intranet page (/intranet/educar_avaliacao_desempenho_cad.php) via network controls or web application firewalls (WAF) with rules to detect and block suspicious input patterns in the titulo_avaliacao and descricao parameters. 2) Conduct user awareness training focused on phishing and social engineering to reduce the risk of user interaction with malicious links. 3) Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers accessing the i-Educar system. 4) Monitor web server and application logs for unusual parameter values or repeated attempts to exploit the vulnerability. 5) If possible, apply input validation or sanitization at the application level by customizing or patching the affected PHP file, even if an official patch is unavailable. 6) Segment the network to isolate the i-Educar system from other critical infrastructure to limit lateral movement. 7) Regularly back up critical data and verify restoration procedures to mitigate potential data integrity issues.