CVE-2025-53824 is a Reflected Cross-Site Scripting (XSS) vulnerability identified in the WeGIA web management application developed by LabRedesCefetRJ. WeGIA is an open-source platform primarily targeting Portuguese-speaking charitable institutions, providing web management functionalities. The vulnerability exists in the editar_permissoes.php endpoint, specifically in the handling of the msg_c parameter. Prior to version 3.4.4, this parameter is improperly sanitized, allowing an attacker to inject malicious JavaScript code that is reflected back in the HTTP response. This type of XSS attack can be exploited by tricking users into clicking crafted URLs or submitting specially crafted requests, leading to the execution of arbitrary scripts in the context of the victim's browser. The CVSS 4.0 score of 6.4 (medium severity) reflects that the vulnerability is remotely exploitable over the network without authentication, requires user interaction, and impacts confidentiality and integrity to a limited extent, with a high scope due to the web context. The vulnerability is fixed in WeGIA version 3.4.4, which properly neutralizes input in the msg_c parameter to prevent script injection. No known exploits are currently reported in the wild, but the presence of this vulnerability in a web-facing application used by charitable organizations poses a risk of phishing, session hijacking, or defacement attacks if left unpatched.

For European organizations, especially charitable institutions or NGOs using WeGIA or similar localized web management tools, this vulnerability could lead to unauthorized script execution in users' browsers. This can result in theft of session cookies, redirection to malicious sites, or unauthorized actions performed on behalf of legitimate users. Given that WeGIA targets Portuguese-speaking communities, European countries with significant Portuguese-speaking populations or NGOs collaborating with Portuguese institutions may be impacted. The impact includes potential compromise of user accounts, leakage of sensitive information, and damage to organizational reputation. While the vulnerability does not directly affect system availability, the indirect consequences of successful exploitation could disrupt operations or lead to data breaches. The medium severity indicates that while the threat is not critical, it requires timely remediation to prevent exploitation, especially in environments where users may be less security-aware.

Organizations using WeGIA should upgrade to version 3.4.4 or later immediately to apply the official patch that neutralizes the msg_c parameter input. Until the upgrade is possible, web application firewalls (WAFs) can be configured to detect and block suspicious requests containing script tags or typical XSS payload patterns targeting the editar_permissoes.php endpoint. Additionally, implementing Content Security Policy (CSP) headers can help mitigate the impact of XSS by restricting the execution of inline scripts and external resources. User education to recognize phishing attempts and suspicious links is also important, as exploitation requires user interaction. Regular security audits and code reviews focusing on input validation and output encoding should be conducted to prevent similar vulnerabilities. Finally, monitoring web server logs for unusual query parameters or error messages related to msg_c can help detect attempted exploitation attempts.