CVE-2025-6695 is a cross-site scripting (XSS) vulnerability identified in version 3.4.0 of the LabRedesCefetRJ WeGIA software, specifically within the Additional Categoria component. The vulnerability arises from improper handling of user input in the /html/matPat/adicionar_categoria.php file, where the argument 'Insira a nova categoria' is not properly sanitized or validated. This flaw allows an attacker to inject malicious scripts that execute in the context of the victim's browser when they access the affected page. The vulnerability is remotely exploitable without requiring authentication, though it requires some user interaction (e.g., the victim visiting a crafted URL). The CVSS 4.0 base score is 5.1, indicating a medium severity level. The attack vector is network-based with low attack complexity and no privileges required, but user interaction is necessary. The impact primarily affects confidentiality and integrity at a limited level, as the injected scripts could steal session cookies, perform actions on behalf of the user, or deface web content. The vendor was notified but has not responded, and no patches or mitigations have been published yet. Although no known exploits are currently in the wild, the public disclosure of the vulnerability increases the risk of exploitation.

For European organizations using LabRedesCefetRJ WeGIA 3.4.0, this vulnerability poses a moderate risk. Successful exploitation could lead to session hijacking, unauthorized actions within the web application, or phishing attacks leveraging the trusted site context. This can result in data leakage, unauthorized data modification, or reputational damage. Organizations relying on WeGIA for critical business functions or handling sensitive data may face operational disruptions or compliance issues, especially under GDPR regulations concerning data protection. The remote exploitability and lack of authentication requirements increase the attack surface, particularly for public-facing installations. However, the need for user interaction somewhat limits automated mass exploitation. Still, targeted attacks against employees or customers are plausible, especially in sectors with high-value data or strategic importance.

Given the absence of an official patch, European organizations should implement immediate compensating controls. These include: 1) Applying strict input validation and output encoding on the 'Insira a nova categoria' parameter at the web application firewall (WAF) level to block malicious payloads; 2) Enabling Content Security Policy (CSP) headers to restrict script execution and reduce the impact of injected scripts; 3) Conducting user awareness training to recognize suspicious links and avoid clicking untrusted URLs; 4) Monitoring web server logs and application behavior for signs of XSS exploitation attempts; 5) Isolating or restricting access to the affected WeGIA component if feasible; 6) Engaging with the vendor or community for updates or unofficial patches; and 7) Planning for an upgrade or migration to a patched version once available. Additionally, organizations should review session management practices to limit the damage from stolen cookies or tokens.