CVE-2025-53823 is a critical SQL Injection vulnerability identified in the open source web management software WeGIA, developed by LabRedesCefetRJ. WeGIA is primarily targeted at Portuguese-speaking charitable institutions and organizations. The vulnerability exists in versions prior to 3.4.5 within the endpoint `/WeGIA/html/socio/sistema/processa_deletar_socio.php`, specifically in the `id_socio` parameter. This parameter is improperly sanitized, allowing an attacker to inject arbitrary SQL commands. Exploitation of this flaw can lead to unauthorized data access, modification, or deletion, severely compromising the confidentiality, integrity, and availability of the underlying database. Given that the vulnerability requires no authentication or user interaction and has a CVSS 4.0 base score of 10.0, it represents a critical risk. The vulnerability affects all installations running versions before 3.4.5, and although no known exploits are currently reported in the wild, the ease of exploitation and the critical impact make it a high-priority issue. The fixed version 3.4.5 addresses this vulnerability by properly neutralizing special elements in SQL commands, preventing injection attacks.

For European organizations, especially those operating charitable or non-profit institutions serving Portuguese-speaking communities or utilizing WeGIA for management, this vulnerability poses a significant threat. Successful exploitation could lead to data breaches involving sensitive personal information of beneficiaries or donors, financial data manipulation, or complete disruption of service availability. This could result in reputational damage, regulatory penalties under GDPR due to data confidentiality breaches, and operational downtime. The critical nature of the vulnerability means attackers can remotely execute arbitrary SQL commands without authentication, increasing the risk of widespread compromise. Organizations relying on WeGIA without applying the patch are at immediate risk, and the impact extends beyond data loss to potential full system compromise if the database is leveraged to pivot attacks further into the network.

European organizations using WeGIA should immediately upgrade to version 3.4.5 or later, which contains the patch for this SQL Injection vulnerability. Until the upgrade is applied, organizations should implement Web Application Firewall (WAF) rules specifically designed to detect and block SQL Injection attempts targeting the `id_socio` parameter in the vulnerable endpoint. Input validation and parameterized queries should be enforced at the application level if source code modifications are feasible. Additionally, organizations should conduct thorough audits of database access logs for suspicious activity and consider isolating the affected application from critical internal networks to limit potential lateral movement. Regular backups of the database should be maintained to enable recovery in case of data corruption or deletion. Finally, monitoring for any emerging exploit code or attack campaigns targeting this CVE is recommended to respond promptly.