CVE-2025-53526 is a Cross-Site Scripting (XSS) vulnerability identified in the WeGIA web management system developed by LabRedesCefetRJ, specifically affecting versions prior to 3.4.3. WeGIA is a platform designed to assist charitable institutions in managing their operations. The vulnerability exists in the novo_memorando.php component, where user input is improperly neutralized during web page generation, allowing malicious scripts to be injected. The attack scenario involves submitting a crafted memo containing malicious JavaScript code. When the vulnerable listar_memorandos_antigos.php page is accessed, the injected script executes in the victim's browser context. This flaw is categorized under CWE-79, indicating improper input sanitization leading to XSS. The vulnerability has a CVSS 4.0 base score of 2.0, reflecting low severity, with an attack vector of network (remote), no privileges or authentication required, but requiring user interaction (visiting the affected page). The impact is limited to client-side script execution without direct compromise of server confidentiality, integrity, or availability. No known exploits are currently reported in the wild. The issue is resolved in WeGIA version 3.4.3, where proper input validation and output encoding have presumably been implemented to prevent script injection.

For European organizations using WeGIA to manage charitable activities, this XSS vulnerability poses a risk primarily to the confidentiality and integrity of users' browsing sessions. An attacker could exploit this flaw to execute arbitrary scripts in the context of authenticated users, potentially leading to session hijacking, phishing, or unauthorized actions performed on behalf of the user. However, since the vulnerability requires user interaction (visiting a maliciously crafted page) and does not allow direct server compromise, the overall impact on organizational infrastructure is limited. The risk is more pronounced in environments where sensitive data is accessible via the web interface or where users have elevated privileges. Additionally, exploitation could be leveraged as a stepping stone for social engineering attacks targeting employees or volunteers. Given the low CVSS score and absence of known exploits, the immediate threat level is low, but organizations should not disregard the potential for targeted attacks, especially in sectors handling personal or financial data.

European organizations should ensure that all instances of WeGIA are updated to version 3.4.3 or later to apply the official patch that addresses this XSS vulnerability. Beyond patching, organizations should implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Input validation and output encoding should be enforced at all entry points, especially for user-generated content such as memos. Regular security training for users to recognize suspicious links and avoid clicking on untrusted content can reduce the risk of exploitation. Web application firewalls (WAFs) can be configured to detect and block common XSS attack patterns targeting the affected endpoints. Additionally, organizations should conduct periodic security assessments and code reviews of customizations or integrations with WeGIA to ensure no residual injection vectors remain. Monitoring web logs for unusual activity on the vulnerable pages can help detect attempted exploitation attempts early.