CVE-2025-8369 is a cross-site scripting (XSS) vulnerability identified in Portabilis i-Educar version 2.9, specifically affecting the file /intranet/educar_avaliacao_desempenho_lst.php. The vulnerability arises from improper handling of the 'titulo_avaliacao' parameter, which allows an attacker to inject malicious scripts that execute in the context of the victim's browser. This vulnerability is remotely exploitable without requiring authentication, and user interaction is necessary to trigger the attack (e.g., by visiting a crafted URL). The CVSS 4.0 base score is 5.3, indicating a medium severity level. The attack vector is network-based with low attack complexity, no privileges required, and no user authentication needed, but user interaction is required. The impact primarily affects the integrity of the victim's browsing session, with limited impact on confidentiality and availability. The vendor was notified early but has not responded or provided a patch, and no official fixes are currently available. Although no known exploits are reported in the wild, the public disclosure of the vulnerability and exploit code increases the risk of exploitation. The vulnerability could be leveraged to perform session hijacking, defacement, or phishing attacks within the i-Educar intranet environment, potentially compromising user trust and data integrity within educational institutions using this platform.

For European organizations, particularly educational institutions using Portabilis i-Educar 2.9, this vulnerability poses a tangible risk to the integrity and security of their intranet portals. Successful exploitation could allow attackers to execute arbitrary scripts in the context of authenticated users, leading to session hijacking, unauthorized actions, or the spread of malware. This could disrupt educational operations, erode trust among students and staff, and potentially expose sensitive educational data indirectly through social engineering or session theft. Given that i-Educar is an education management system, the impact extends to the confidentiality of student records and the integrity of academic evaluations. While the vulnerability does not directly compromise availability or confidentiality, the indirect effects of successful XSS attacks could be significant. The lack of vendor response and patch availability increases the window of exposure, making timely mitigation critical for European institutions relying on this software.

1. Implement strict input validation and output encoding on the 'titulo_avaliacao' parameter to neutralize malicious scripts. 2. Deploy Web Application Firewalls (WAFs) with custom rules to detect and block XSS payloads targeting the vulnerable endpoint. 3. Educate users to avoid clicking on suspicious links and to report unusual behavior within the i-Educar portal. 4. Restrict access to the intranet portal to trusted networks and enforce HTTPS to prevent interception and injection of malicious content. 5. Monitor web server logs for unusual requests targeting /intranet/educar_avaliacao_desempenho_lst.php and anomalous query parameters. 6. If possible, isolate the vulnerable system from critical networks until a vendor patch or official fix is released. 7. Consider deploying Content Security Policy (CSP) headers to limit the execution of unauthorized scripts within the application context. 8. Engage with Portabilis or community forums to track any forthcoming patches or workarounds and apply them promptly.