CVE-2025-6699 is a cross-site scripting (XSS) vulnerability identified in version 3.4.0 of the LabRedesCefetRJ WeGIA software, specifically within the 'Cadastro de Funcionário' component located in the /html/funcionario/cadastro_funcionario.php file. The vulnerability arises due to improper sanitization or validation of user-supplied input in the 'Nome' and 'Sobrenome' parameters, which can be manipulated by an attacker to inject malicious scripts. This flaw allows remote attackers to execute arbitrary JavaScript in the context of the victim's browser without requiring authentication, although user interaction is necessary to trigger the payload (e.g., by visiting a crafted URL). The CVSS 4.0 base score is 5.1 (medium severity), reflecting that the attack vector is network-based with low attack complexity, no privileges required, but user interaction is needed. The vulnerability impacts confidentiality and integrity to a limited extent by potentially stealing session cookies, performing actions on behalf of the user, or defacing web content. The vendor was notified early but has not responded or issued a patch, and no known exploits have been observed in the wild yet. This vulnerability is distinct from CVE-2025-23030, indicating multiple security issues in the product. Given the public disclosure and lack of remediation, the risk of exploitation may increase over time.

For European organizations using LabRedesCefetRJ WeGIA 3.4.0, this vulnerability poses a moderate risk primarily to web application users and administrators. Successful exploitation could lead to session hijacking, unauthorized actions performed under the victim's credentials, or distribution of malicious content, potentially undermining user trust and leading to data leakage or reputational damage. Although the vulnerability does not directly compromise backend systems or data integrity at a high level, it can serve as an entry point for social engineering or further attacks. Organizations in sectors with strict data protection regulations such as GDPR may face compliance risks if user data is exposed. The lack of vendor response and patch availability increases the urgency for organizations to implement compensating controls. The impact is more pronounced in environments where WeGIA is used for managing employee or personnel records, as attackers could leverage the XSS to manipulate or exfiltrate sensitive information indirectly.

Since no official patch is available, European organizations should implement the following specific mitigations: 1) Employ web application firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the 'Nome' and 'Sobrenome' parameters in the affected URL path. 2) Conduct input validation and output encoding on the server side where possible, even if the vendor has not released a fix, by applying reverse proxies or middleware that sanitize inputs before reaching the application. 3) Educate users and administrators about the risks of clicking on suspicious links and implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4) Monitor web server logs for unusual requests or payload patterns targeting the vulnerable endpoint. 5) Isolate or restrict access to the affected application to trusted networks until a patch is available. 6) Engage with the vendor or community to track any forthcoming patches or updates. 7) Consider upgrading or migrating to alternative software solutions if feasible to reduce exposure.