CVE-2025-53932 is a Reflected Cross-Site Scripting (XSS) vulnerability identified in the WeGIA web management application developed by LabRedesCefetRJ. WeGIA is an open-source platform primarily targeting Portuguese-speaking charitable institutions. The vulnerability exists in the `cadastro_adotante.php` endpoint, specifically in the handling of the `cpf` parameter, which is susceptible to improper input neutralization. This flaw allows an attacker to inject malicious scripts that are reflected back to the user without proper sanitization or encoding. When a victim accesses a crafted URL containing the malicious payload in the `cpf` parameter, the injected script executes in the context of the victim’s browser. This can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The vulnerability affects all WeGIA versions prior to 3.4.5, with version 3.4.5 addressing the issue through proper input validation and output encoding. The CVSS 4.0 base score is 6.4 (medium severity), reflecting that the attack vector is network-based, requires no privileges or authentication, but does require user interaction (clicking a malicious link). The impact on confidentiality and integrity is low, but the scope and availability impacts are high due to the potential for session compromise and further exploitation. No known exploits are currently reported in the wild, but the vulnerability’s presence in a niche but critical sector (charitable institutions) and its ease of exploitation make it a relevant threat.

For European organizations, especially those operating charitable or non-profit institutions that may use WeGIA or similar localized management platforms, this vulnerability poses a risk of client-side attacks leading to credential theft, session hijacking, or unauthorized actions within the application. Given the focus on Portuguese language and charitable institutions, organizations in Portugal and Portuguese-speaking communities in Europe are most at risk. Exploitation could lead to data breaches involving sensitive personal information of donors or beneficiaries, reputational damage, and potential regulatory penalties under GDPR if personal data is compromised. Additionally, attackers could leverage this vulnerability as a foothold for further attacks within the organization’s network or to distribute malware to users. The medium severity rating suggests a moderate but tangible risk, particularly if phishing campaigns are used to lure users into clicking malicious links.

Organizations using WeGIA should immediately upgrade to version 3.4.5 or later to apply the official patch that fixes the XSS vulnerability. Until the upgrade is possible, implement web application firewall (WAF) rules to detect and block suspicious input patterns targeting the `cpf` parameter, especially payloads containing script tags or event handlers. Conduct security awareness training to educate users about the risks of clicking unknown or suspicious links, particularly those that appear to come from within the organization. Developers maintaining forks or customized versions of WeGIA should review input validation and output encoding practices, ensuring that all user-supplied data is properly sanitized before rendering. Additionally, implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. Regularly monitor logs for unusual access patterns to the vulnerable endpoint and consider implementing rate limiting to reduce the risk of automated exploitation attempts.