CVE-2025-57763 is a Reflected Cross-Site Scripting (XSS) vulnerability identified in the WeGIA web management application developed by LabRedesCefetRJ, specifically affecting versions prior to 3.4.7. WeGIA is used to manage charitable institutions, and the vulnerability exists in the insere_despacho.php endpoint. The flaw arises from improper neutralization of user input in the 'cpf sccs' parameter, allowing an attacker to inject malicious scripts that are reflected back in the web page response. This type of vulnerability falls under CWE-79, which involves improper sanitization or encoding of input data during web page generation, leading to script injection. The CVSS 4.0 base score is 6.4 (medium severity), with characteristics including network attack vector, low attack complexity, no privileges required, but requiring user interaction. The vulnerability impacts confidentiality and integrity at a low level, with high scope and impact on security properties. No known exploits are currently reported in the wild, and the issue was published on August 21, 2025. The vulnerability has been addressed in version 3.4.7 of WeGIA, which includes the necessary input validation and output encoding to prevent script injection. Reflected XSS can be exploited by tricking users into clicking malicious links or submitting crafted requests, potentially leading to session hijacking, credential theft, or unauthorized actions performed in the context of the victim's session. Given WeGIA's role in managing charitable organizations, exploitation could disrupt operations or compromise sensitive donor or beneficiary information.

For European organizations using WeGIA, particularly charitable institutions, this vulnerability poses a risk of client-side script injection that could lead to session hijacking, theft of sensitive information, or unauthorized actions performed on behalf of legitimate users. Although the vulnerability requires user interaction, phishing or social engineering campaigns could be used to lure users into triggering the exploit. The impact on confidentiality and integrity, while rated low individually, can be significant in aggregate, especially if attackers leverage the vulnerability to pivot into further attacks or data exfiltration. Disruption of charitable services or damage to organizational reputation could also result. Since WeGIA is a niche product, the overall exposure in Europe depends on its adoption; however, any affected organization handling personal or financial data must consider this a serious concern. The lack of known exploits in the wild suggests limited current threat activity, but the availability of a fix means organizations should prioritize patching to prevent future exploitation.

Organizations should immediately upgrade WeGIA installations to version 3.4.7 or later, where the vulnerability is fixed. If upgrading is not immediately possible, implement web application firewall (WAF) rules to detect and block suspicious input patterns targeting the insere_despacho.php endpoint, especially inputs in the 'cpf sccs' parameter. Conduct thorough input validation and output encoding on all user-supplied data to prevent script injection. Educate users about phishing risks and the dangers of clicking untrusted links, as user interaction is required for exploitation. Regularly audit and monitor web server logs for unusual requests or error patterns related to this endpoint. Additionally, implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser context. Finally, ensure that incident response plans include procedures for handling potential XSS exploitation scenarios.