CVE-2025-8543 is a cross-site scripting (XSS) vulnerability identified in version 2.10 of Portabilis i-Educar, an educational management system. The vulnerability arises from improper sanitization of the 'nm_raca' parameter in the /intranet/educar_raca_cad.php file. An attacker can manipulate this parameter to inject malicious scripts that execute in the context of a victim's browser session. This vulnerability is remotely exploitable without requiring authentication, although user interaction is necessary to trigger the malicious payload. The CVSS 4.0 base score is 4.8, indicating a medium severity level. The attack vector is network-based with low attack complexity, and no privileges are required, but user interaction is needed. The vulnerability impacts confidentiality to a limited extent and integrity to a low extent, with no direct impact on availability. The vendor was notified but has not responded or issued a patch, and public exploit details have been disclosed, increasing the risk of exploitation. The vulnerability affects a specific function within the intranet module, which suggests that exploitation may be limited to users with access to the intranet interface, potentially internal staff or students. However, given the remote exploitability and public disclosure, attackers could craft phishing or social engineering campaigns to trick users into executing malicious scripts, leading to session hijacking, credential theft, or unauthorized actions within the i-Educar platform.

For European organizations, especially educational institutions using Portabilis i-Educar 2.10, this vulnerability poses a risk of unauthorized access to sensitive educational data and user credentials. Exploitation could lead to session hijacking, enabling attackers to impersonate legitimate users and potentially manipulate student records, grades, or personal information. This could result in data breaches violating GDPR requirements, leading to regulatory penalties and reputational damage. Additionally, compromised accounts could be leveraged for further lateral movement within institutional networks. The lack of vendor response and patch availability increases the urgency for European entities to implement mitigations. The impact is particularly significant for institutions with large user bases or those that rely heavily on i-Educar for critical administrative functions.

Given the absence of an official patch, European organizations should implement immediate compensating controls. These include: 1) Input validation and output encoding on the affected parameter 'nm_raca' at the web application firewall (WAF) or reverse proxy level to block or sanitize malicious payloads. 2) Deploy Content Security Policy (CSP) headers to restrict script execution sources and reduce the impact of injected scripts. 3) Educate users on phishing and social engineering risks to minimize the likelihood of triggering malicious scripts. 4) Restrict access to the intranet module to trusted networks or VPNs to limit exposure. 5) Monitor web server and application logs for suspicious parameter usage patterns indicative of exploitation attempts. 6) Consider temporary disabling or restricting the vulnerable functionality if feasible. 7) Plan for an upgrade or migration to a patched version once available or evaluate alternative platforms. These targeted mitigations go beyond generic advice by focusing on the specific vulnerable parameter and the operational context of i-Educar.