CVE-2026-1483 identifies a critical SQL injection vulnerability classified under CWE-89 in the Quatuor Evaluación de Desempeño (EDD) application, a performance evaluation tool developed by Gabinete Técnico de Programación. The vulnerability is an out-of-band (OOB) SQL injection affecting the 'Id_usuario' parameter in the '/evaluacion_objetivos_ver_auto.aspx' page. Unlike traditional in-band SQL injection, OOB SQLi allows attackers to exfiltrate data through external channels such as DNS or HTTP requests initiated by the database server, bypassing direct response filtering or detection. This vulnerability affects all versions of the product and requires no authentication or user interaction, making it highly exploitable remotely over the network. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N) reflects network attack vector, low complexity, no privileges or user interaction needed, with high impact on confidentiality and integrity, and low impact on availability. The absence of patches increases the urgency for organizations to implement mitigations. The vulnerability could lead to unauthorized disclosure of sensitive data stored in the backend database, potentially including personal employee information, evaluation results, or other confidential organizational data. Given the nature of the application, exploitation could severely damage organizational trust and compliance with data protection regulations such as GDPR.

For European organizations, the impact of CVE-2026-1483 is significant due to the potential exposure of sensitive employee performance data and other confidential information managed by the EDD application. Such data breaches could lead to violations of GDPR, resulting in regulatory fines and reputational damage. The critical severity and ease of exploitation mean attackers could remotely extract data without detection, increasing the risk of espionage, insider threats, or competitive intelligence gathering. Organizations relying on this application for HR or performance management face operational risks if data integrity is compromised, potentially affecting decision-making and employee trust. The out-of-band nature of the attack complicates detection and forensic analysis, making incident response more challenging. Additionally, the lack of available patches means that affected entities must rely on interim controls, which may not fully prevent exploitation. This vulnerability could also be leveraged as a foothold for further network intrusion or lateral movement within corporate environments.

Immediate mitigation should focus on implementing strict input validation and sanitization for the 'Id_usuario' parameter, ensuring that only expected data types and formats are accepted. Developers should refactor the affected code to use parameterized queries or stored procedures to eliminate direct concatenation of user input into SQL commands. Deploying a web application firewall (WAF) with custom rules to detect and block SQL injection patterns, especially those indicative of OOB techniques, can provide an additional layer of defense. Network monitoring should be enhanced to detect unusual outbound DNS or HTTP requests originating from database servers, which may indicate exploitation attempts. Organizations should conduct thorough code audits of all web-facing applications to identify similar injection points. Until official patches are released, isolating the application environment and restricting database server outbound connectivity can reduce exfiltration risks. Regular security training for developers and administrators on secure coding practices and vulnerability awareness is also recommended. Finally, organizations should prepare incident response plans specific to SQL injection attacks to enable rapid containment and remediation.