CVE-2025-6696 is a cross-site scripting (XSS) vulnerability identified in version 3.4.0 of the LabRedesCefetRJ WeGIA software, specifically within the Cadastro de Atendio component, in the file /html/atendido/Cadastro_Atendido.php. The vulnerability arises due to improper sanitization or validation of user-supplied input in the Nome/Sobrenome parameters, which can be manipulated by an attacker to inject malicious scripts. This flaw allows remote attackers to execute arbitrary JavaScript code in the context of the victim's browser when they visit a crafted URL or interact with the vulnerable web application. The vulnerability does not require authentication but does require user interaction (e.g., clicking a malicious link). The CVSS 4.0 base score is 5.1 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, but requiring user interaction. The impact on confidentiality is none, integrity is low, and availability is none. The vendor was notified but did not respond, and no patches are currently available. Although no known exploits are reported in the wild, public disclosure of the vulnerability means attackers could develop exploits. This vulnerability is distinct from CVE-2025-22615, indicating multiple issues in the product. Given the nature of XSS, attackers could leverage this vulnerability for session hijacking, phishing, or delivering further payloads, potentially compromising user trust and data integrity within affected deployments.

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 theft of session cookies, enabling account takeover, or execution of malicious scripts that could redirect users to phishing sites or deliver malware. While the vulnerability does not directly compromise system confidentiality or availability, it undermines the integrity of user interactions and could facilitate further attacks. Organizations in sectors with high reliance on this software for client or internal management could face reputational damage, regulatory scrutiny under GDPR if personal data is compromised, and operational disruptions. The lack of vendor response and absence of patches increases the window of exposure, necessitating proactive mitigation. The remote and unauthenticated nature of the vulnerability combined with user interaction means phishing or social engineering campaigns could be used to exploit it, increasing risk especially in environments with less security awareness.

Given the absence of official patches, European organizations should implement immediate compensating controls. These include: 1) Implement strict input validation and output encoding on the Nome/Sobrenome fields at the web application firewall (WAF) or reverse proxy level to block malicious scripts. 2) Deploy Content Security Policy (CSP) headers to restrict execution of unauthorized scripts in browsers. 3) Educate users and administrators about the risk of clicking suspicious links and recognizing phishing attempts. 4) Monitor web server logs for unusual query parameters or payloads targeting the vulnerable endpoints. 5) If feasible, isolate or restrict access to the vulnerable component until a vendor patch or update is available. 6) Consider upgrading to a newer, unaffected version if available or applying custom code fixes to sanitize inputs. 7) Regularly review and update incident response plans to quickly address any exploitation attempts. These targeted measures go beyond generic advice by focusing on the specific vulnerable parameters and leveraging layered defenses.