CVE-2025-62597 identifies a reflected cross-site scripting (XSS) vulnerability in the WeGIA application, an open-source web management system targeted primarily at Portuguese language institutions. The vulnerability exists in the editar_info_pessoal.php endpoint, where the 'sql' GET parameter is improperly sanitized, allowing attackers to inject malicious JavaScript code. This improper neutralization of input during web page generation corresponds to CWE-79. Since the vulnerability is reflected, the malicious payload is included in the URL and executed when a victim accesses the crafted link. The vulnerability does not require authentication, user interaction, or special privileges, increasing its exploitation potential. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and no impact on confidentiality, integrity, or availability (VC:N/VI:N/VA:N), but with scope impact (S:I:L) due to potential session or context hijacking. The vulnerability was patched in WeGIA version 3.5.1, and no public exploits have been reported yet. The vulnerability's presence in a web management tool used by institutions makes it a significant risk for targeted phishing or social engineering attacks that leverage XSS to steal credentials or perform unauthorized actions within user sessions.

For European organizations, especially those using WeGIA for institutional web management, this vulnerability poses a risk of client-side script execution leading to session hijacking, credential theft, or unauthorized actions performed on behalf of users. Given WeGIA's focus on Portuguese language users, institutions in Portugal and Portuguese-speaking communities in Europe are particularly at risk. The reflected XSS can be exploited via crafted URLs sent through phishing campaigns or malicious links, potentially compromising user accounts and sensitive institutional data. Although the vulnerability does not directly impact server confidentiality or availability, successful exploitation can lead to significant reputational damage, data breaches, and loss of user trust. The lack of authentication requirement increases the attack surface, making it easier for attackers to target a wide range of users. The medium CVSS score reflects moderate risk, but the potential for chained attacks or use in broader social engineering campaigns elevates its importance for European entities relying on WeGIA.

European organizations using WeGIA should immediately upgrade to version 3.5.1 or later, where the vulnerability is patched. In addition to patching, organizations should implement strict input validation and output encoding on all user-supplied data, particularly URL parameters, to prevent XSS. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Regularly audit web application endpoints for injection vulnerabilities using automated scanning tools tailored for XSS detection. Educate users and administrators about the risks of clicking on untrusted links and implement email filtering to reduce phishing attempts. Monitor web server logs for suspicious requests containing script tags or unusual URL parameters. If upgrading is delayed, consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the 'sql' parameter in the vulnerable endpoint. Finally, maintain an incident response plan to quickly address any detected exploitation attempts.