CVE-2025-40714: Quiter Gateway SQL Injection Vulnerability

CVE-2025-40714 Overview

CVE-2025-40714 is a critical SQL injection vulnerability affecting Quiter Gateway versions prior to 4.7.0. This vulnerability allows an unauthenticated attacker to retrieve, create, update, and delete database contents by exploiting the id_factura parameter in the /<Client>FacturaE/listado_facturas_ficha.jsp endpoint. The flaw stems from insufficient input validation, enabling attackers to inject malicious SQL statements and gain complete control over backend database operations.

Critical Impact

Unauthenticated attackers can perform full database manipulation including data exfiltration, modification, and deletion through SQL injection in the invoice listing functionality.

Affected Products

• Quiter Gateway versions prior to 4.7.0
• Quiter Gateway invoice management module (listado_facturas_ficha.jsp)
• Systems utilizing the id_factura parameter in FacturaE endpoints

Discovery Timeline

• 2025-07-08 - CVE-2025-40714 published to NVD
• 2025-10-15 - Last updated in NVD database

Technical Details for CVE-2025-40714

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the Quiter Gateway web application's invoice listing functionality. The vulnerable endpoint /<Client>FacturaE/listado_facturas_ficha.jsp accepts user-supplied input through the id_factura parameter without proper sanitization or parameterized query implementation. When user input is directly concatenated into SQL queries, attackers can manipulate the query structure to execute arbitrary database commands.

The vulnerability is particularly severe because it requires no authentication, allowing any network-accessible attacker to exploit it. The attack surface includes all standard SQL injection techniques such as UNION-based injection for data extraction, boolean-based blind injection for inference attacks, and stacked queries for data modification or deletion operations.

Root Cause

The root cause of this vulnerability is improper input validation and the absence of parameterized queries (prepared statements) in the application's database interaction layer. The id_factura parameter value is directly incorporated into SQL query strings without sanitization, escaping, or type checking. This allows specially crafted input containing SQL syntax to alter the intended query logic and execute unauthorized database operations.

Attack Vector

The attack vector is network-based, requiring no privileges or user interaction. An attacker can exploit this vulnerability by sending malicious HTTP requests to the vulnerable JSP endpoint with crafted SQL payloads in the id_factura parameter. The attack flow typically involves:

1. Identifying the vulnerable endpoint at /<Client>FacturaE/listado_facturas_ficha.jsp
2. Injecting SQL syntax into the id_factura parameter to test for vulnerability
3. Crafting payloads to enumerate database structure, extract sensitive data, or modify records
4. Executing data exfiltration or manipulation commands through the compromised query

Since the vulnerability allows retrieval, creation, updating, and deletion of database contents, attackers can achieve complete database compromise including accessing sensitive invoice data, customer information, and potentially pivoting to other connected systems.

Detection Methods for CVE-2025-40714

Indicators of Compromise

• Unusual SQL syntax patterns appearing in web server logs for requests to listado_facturas_ficha.jsp
• Anomalous id_factura parameter values containing SQL keywords such as UNION, SELECT, INSERT, UPDATE, DELETE, or comment sequences (--, /*)
• Database audit logs showing unexpected queries or mass data access patterns
• Error messages in application logs indicating SQL syntax errors from malformed injection attempts

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the id_factura parameter
• Implement database activity monitoring to alert on suspicious query patterns or unauthorized data access
• Configure application logging to capture all requests to FacturaE endpoints with full parameter values
• Use intrusion detection systems (IDS) with SQL injection signature rules for HTTP traffic analysis

Monitoring Recommendations

• Enable detailed access logging for all JSP endpoints, particularly those handling invoice operations
• Monitor database connection pools for unusual query volumes or execution times
• Set up alerts for database errors indicating potential injection attempts
• Review authentication logs for patterns of unauthenticated access to sensitive endpoints

How to Mitigate CVE-2025-40714

Immediate Actions Required

• Upgrade Quiter Gateway to version 4.7.0 or later immediately
• Implement network-level access controls to restrict access to the vulnerable endpoint until patching is complete
• Deploy WAF rules to filter SQL injection attempts targeting the id_factura parameter
• Audit database access logs for evidence of prior exploitation

Patch Information

Quiter has addressed this vulnerability in Quiter Gateway version 4.7.0. Organizations should upgrade to this version or later to remediate the SQL injection flaw. For detailed information about the vulnerability and remediation guidance, refer to the INCIBE Security Notice.

Workarounds

• Implement input validation at the application layer to reject id_factura values containing non-numeric characters or SQL syntax
• Deploy a reverse proxy or WAF with SQL injection filtering capabilities in front of the application
• Restrict network access to the vulnerable endpoint to trusted IP ranges only
• If the invoice listing functionality is not critical, consider temporarily disabling access to the listado_facturas_ficha.jsp endpoint

# Example WAF rule to block SQL injection in id_factura parameter (ModSecurity)
SecRule ARGS:id_factura "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in id_factura parameter - CVE-2025-40714',\
    tag:'attack-sqli'"