CVE-2025-53377 is a reflected Cross-Site Scripting (XSS) vulnerability identified in the WeGIA web management application developed by LabRedesCefetRJ, which is used primarily by charitable institutions. The vulnerability exists in the 'cadastro_dependente_pessoa_nova.php' endpoint, specifically in the handling of the 'id_funcionario' parameter. An attacker can craft a malicious URL or HTTP request that injects executable JavaScript code into this parameter. When a victim accesses this crafted link, the malicious script is reflected back and executed in the victim's browser context. This can lead to session hijacking, defacement, or redirection to malicious sites. The vulnerability affects all versions prior to 3.4.3, where it has been fixed. The CVSS v4.0 score is 2.0, indicating low severity, primarily because the attack requires user interaction (clicking a malicious link), does not require authentication, and does not impact confidentiality, integrity, or availability directly. There are no known exploits in the wild as of the publication date. The vulnerability falls under CWE-79, which is a common web application security flaw caused by improper neutralization of input during web page generation. The vulnerability is exploitable remotely over the network without privileges but requires user interaction to trigger the malicious script execution. The scope is limited to the affected web application and does not escalate beyond the user's browser session. The fix involves proper input validation and output encoding to neutralize malicious scripts in the 'id_funcionario' parameter, implemented in version 3.4.3 of WeGIA.

For European organizations using the WeGIA application, particularly charitable institutions managing sensitive beneficiary or employee data, this vulnerability poses a risk primarily to end-users who might be tricked into clicking malicious links. The impact is mostly limited to client-side attacks such as session hijacking, phishing, or unauthorized actions performed in the context of the victim's session. While the vulnerability does not directly compromise backend systems or data confidentiality, successful exploitation can lead to reputational damage, loss of user trust, and potential indirect access to sensitive information if session tokens are stolen. Given the low CVSS score and lack of known exploits, the immediate risk is low; however, organizations should remain vigilant as attackers often chain XSS with other vulnerabilities for more severe attacks. The vulnerability could also be leveraged in targeted phishing campaigns against employees or beneficiaries of European charitable organizations using WeGIA, increasing the risk of social engineering attacks.

Organizations should upgrade WeGIA to version 3.4.3 or later where the vulnerability is patched. If immediate upgrade is not feasible, implement web application firewall (WAF) rules to detect and block suspicious input patterns targeting the 'id_funcionario' parameter. Conduct user awareness training to reduce the likelihood of users clicking on suspicious links. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Regularly audit and sanitize all user inputs and outputs in the application codebase to prevent similar XSS vulnerabilities. Monitor web server logs for unusual requests targeting the vulnerable endpoint. Additionally, implement multi-factor authentication (MFA) to reduce the impact of session hijacking if it occurs. Finally, maintain an incident response plan to quickly address any exploitation attempts.