CVE-2025-6697 is a cross-site scripting (XSS) vulnerability identified in version 3.4.0 of the LabRedesCefetRJ WeGIA product. The vulnerability exists in an unspecified functionality within the file /html/matPat/adicionar_tipoEntrada.php, specifically in the component responsible for adding new types (Adicionar tipo). The flaw arises from improper sanitization or validation of the input parameter labeled 'Insira o novo tipo', which allows an attacker to inject malicious scripts. Because the vulnerability can be exploited remotely without prior authentication, an attacker can craft a specially crafted request to execute arbitrary JavaScript code in the context of the victim's browser. This can lead to session hijacking, defacement, or redirection to malicious sites. The vendor was notified early but has not responded or provided a patch. Although no known exploits are currently observed in the wild, public disclosure of the exploit code increases the risk of exploitation. The CVSS 4.0 base score is 5.1 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, but user interaction is necessary. The vulnerability impacts confidentiality and integrity to a limited extent and does not affect availability. The lack of vendor response and patch availability increases the urgency for organizations to implement mitigations.

For European organizations using LabRedesCefetRJ WeGIA 3.4.0, this vulnerability presents a moderate security risk. Successful exploitation could allow attackers to execute malicious scripts in users' browsers, potentially leading to theft of session cookies, unauthorized actions on behalf of users, or distribution of malware. This is particularly concerning for organizations handling sensitive data or critical workflows through the affected application. The remote exploitation capability without authentication means attackers can target exposed web interfaces directly. While the impact on availability is minimal, the compromise of user sessions or data integrity could lead to reputational damage, regulatory non-compliance (e.g., GDPR breaches), and financial losses. The absence of a vendor patch means organizations must rely on compensating controls. Additionally, public exploit disclosure increases the likelihood of opportunistic attacks, especially against less-secured or legacy deployments.

Given the lack of an official patch, 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 'Insira o novo tipo' parameter in the /html/matPat/adicionar_tipoEntrada.php endpoint. 2) Conduct input validation and output encoding at the application layer if source code access is available, sanitizing user inputs to neutralize script injections. 3) Restrict access to the vulnerable component by IP whitelisting or VPN tunnels to limit exposure to trusted users only. 4) Monitor web server logs and application logs for suspicious requests containing script tags or unusual payloads targeting the affected endpoint. 5) Educate users about the risks of XSS and encourage cautious behavior regarding unexpected prompts or links within the application. 6) Consider deploying Content Security Policy (CSP) headers to reduce the impact of injected scripts by restricting script sources. 7) Plan for an upgrade or migration to a patched or alternative solution once available, as these mitigations are temporary.