CVE-2025-40715: Quiter Gateway SQL Injection Vulnerability

CVE-2025-40715 Overview

CVE-2025-40715 is a critical SQL injection vulnerability affecting Quiter Gateway versions prior to 4.7.0. This vulnerability allows unauthenticated attackers to manipulate database queries through the campo mensaje parameter in the /QISClient/api/v1/sucesospaginas endpoint. Successful exploitation enables attackers to retrieve, create, update, and delete database contents, potentially compromising the entire data integrity of affected systems.

Critical Impact

Unauthenticated attackers can perform full database manipulation including data exfiltration, modification, and deletion through SQL injection in the Quiter Gateway API endpoint.

Affected Products

• Quiter Gateway versions prior to 4.7.0
• Quiter Quiter Gateway (all configurations using vulnerable API endpoint)

Discovery Timeline

• 2025-07-08 - CVE-2025-40715 published to NVD
• 2025-10-18 - Last updated in NVD database

Technical Details for CVE-2025-40715

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists due to improper neutralization of special elements used in SQL commands within the Quiter Gateway application. The vulnerable endpoint /QISClient/api/v1/sucesospaginas fails to properly sanitize user-supplied input in the campo mensaje parameter before incorporating it into SQL queries.

The network-accessible nature of this vulnerability, combined with the lack of authentication requirements, makes it particularly dangerous in production environments. An attacker can exploit this flaw remotely without any prior access or user interaction, enabling complete database compromise including data theft, manipulation, and destruction.

Root Cause

The root cause is improper input validation and lack of parameterized queries in the Quiter Gateway API. The campo mensaje parameter is directly concatenated into SQL statements without proper sanitization or the use of prepared statements, allowing malicious SQL syntax to be interpreted as part of the database query.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests to the vulnerable endpoint /QISClient/api/v1/sucesospaginas, injecting SQL commands through the campo mensaje parameter.

The injection point allows attackers to:

• Execute arbitrary SELECT statements to exfiltrate sensitive data
• Perform INSERT operations to inject malicious records
• Execute UPDATE commands to modify existing data
• Run DELETE statements to destroy database contents
• Potentially escalate to command execution depending on database configuration

For technical details on the vulnerability mechanism, refer to the INCIBE CERT Security Notice.

Detection Methods for CVE-2025-40715

Indicators of Compromise

• Unusual or malformed HTTP requests to /QISClient/api/v1/sucesospaginas containing SQL syntax characters such as single quotes, semicolons, or SQL keywords
• Database query logs showing unexpected SELECT, INSERT, UPDATE, or DELETE operations originating from the web application
• Anomalous data modifications or deletions in database tables associated with the Quiter Gateway
• Web server access logs containing URL-encoded SQL injection payloads in the campo mensaje parameter

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the vulnerable endpoint
• Deploy database activity monitoring to identify suspicious query patterns or unauthorized data access
• Configure intrusion detection systems (IDS) to alert on traffic containing common SQL injection signatures to Quiter Gateway endpoints
• Enable detailed logging on the /QISClient/api/v1/sucesospaginas endpoint and analyze for anomalous parameter values

Monitoring Recommendations

• Monitor HTTP traffic to Quiter Gateway for requests containing SQL metacharacters (e.g., ', ", ;, --, /*) in the campo mensaje parameter
• Set up alerts for database errors or exceptions that may indicate failed injection attempts
• Review database audit logs regularly for unauthorized operations or unexpected query patterns
• Implement rate limiting on the affected API endpoint to slow potential automated exploitation attempts

How to Mitigate CVE-2025-40715

Immediate Actions Required

• Upgrade Quiter Gateway to version 4.7.0 or later immediately to address this critical vulnerability
• If immediate patching is not possible, restrict network access to the /QISClient/api/v1/sucesospaginas endpoint using firewall rules or network segmentation
• Implement WAF rules to block SQL injection attempts targeting the vulnerable parameter
• Audit database contents and logs to determine if exploitation has already occurred
• Rotate database credentials and review database user permissions to limit potential damage

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 additional details, consult the INCIBE CERT Security Notice.

Workarounds

• Deploy a Web Application Firewall (WAF) with SQL injection detection rules to filter malicious requests before they reach the application
• Implement network-level access controls to restrict access to the vulnerable endpoint from untrusted networks
• Use a reverse proxy to inspect and sanitize input to the /QISClient/api/v1/sucesospaginas endpoint
• Minimize database user privileges used by the Quiter Gateway application to reduce the impact of potential exploitation

# Example: Block access to vulnerable endpoint using iptables (temporary mitigation)
# Replace YOUR_QUITER_SERVER_IP with actual server IP
# Allow only trusted networks to access the API endpoint
iptables -A INPUT -p tcp --dport 443 -d YOUR_QUITER_SERVER_IP -m string --string "/QISClient/api/v1/sucesospaginas" --algo bm -j DROP