CVE-2025-4764: Hotel Guest Hotspot SQLi Vulnerability

CVE-2025-4764 Overview

CVE-2025-4764 is a SQL Injection vulnerability affecting the Hotel Guest Hotspot product developed by Aida Computer Information Technology Inc. This vulnerability allows attackers with adjacent network access and low-level privileges to execute arbitrary SQL commands against the underlying database, potentially leading to unauthorized data access, modification, or deletion.

The vulnerability stems from improper neutralization of special elements used in SQL commands (CWE-89), a classic input validation flaw that remains one of the most dangerous web application security risks.

Critical Impact

Successful exploitation could allow attackers to extract sensitive guest information, modify hotel records, or completely compromise the database backend of affected Hotel Guest Hotspot installations.

Affected Products

• Hotel Guest Hotspot through version 22012026
• Aida Computer Information Technology Inc. Hotel Guest Hotspot systems
• Hotel network infrastructure utilizing vulnerable hotspot software versions

Discovery Timeline

• 2026-01-22 - CVE CVE-2025-4764 published to NVD
• 2026-01-22 - Last updated in NVD database

Note: The vendor was contacted early about this disclosure but did not respond in any way.

Technical Details for CVE-2025-4764

Vulnerability Analysis

This SQL Injection vulnerability exists in the Hotel Guest Hotspot product, which is commonly deployed in hospitality environments to manage guest network access. The attack requires adjacent network access, meaning an attacker must be on the same local network segment as the vulnerable system—a scenario easily achievable for hotel guests or anyone with physical access to the premises.

The vulnerability allows authenticated users with low privileges to inject malicious SQL statements into the application. Once exploited, attackers can potentially achieve complete compromise of the confidentiality, integrity, and availability of data stored in the backend database. This is particularly concerning in a hotel environment where sensitive guest information including personal details, payment data, and network usage logs may be stored.

Root Cause

The root cause of this vulnerability is the improper neutralization of special elements used in SQL commands (CWE-89). The application fails to properly sanitize or parameterize user-supplied input before incorporating it into SQL queries. This allows attackers to break out of the intended query structure and inject arbitrary SQL commands that are then executed by the database server with the application's privileges.

Common patterns that lead to this type of vulnerability include string concatenation in query building, lack of prepared statements or parameterized queries, and insufficient input validation on user-controllable parameters.

Attack Vector

The attack vector for CVE-2025-4764 requires adjacent network access, meaning the attacker must be positioned on the same network segment as the vulnerable Hotel Guest Hotspot system. In a typical hotel deployment scenario, this could be achieved by:

1. Connecting to the hotel's guest WiFi network
2. Having physical access to network ports in public areas
3. Compromising another device on the same network segment

Once positioned on the adjacent network, an attacker with low-level authentication can craft malicious SQL injection payloads targeting vulnerable input fields or parameters in the Hotel Guest Hotspot application. The injection technique exploits the lack of proper input sanitization, allowing database manipulation through specially crafted requests.

For technical details on SQL injection exploitation techniques and specific attack patterns, refer to the USOM Security Advisory TR-26-0001.

Detection Methods for CVE-2025-4764

Indicators of Compromise

• Unusual database query patterns or errors in application logs indicating SQL syntax anomalies
• Unexpected data exfiltration or large query results being returned to low-privilege users
• Authentication bypass attempts or privilege escalation events in the hotspot management interface
• Suspicious login activity from guest network segments targeting administrative functions

Detection Strategies

• Deploy Web Application Firewalls (WAF) with SQL injection detection signatures to monitor traffic to Hotel Guest Hotspot systems
• Implement database activity monitoring to detect anomalous query patterns, especially those containing SQL metacharacters
• Monitor application logs for SQL error messages that may indicate injection attempts
• Establish network segmentation alerts for unusual traffic between guest network segments and backend database servers

Monitoring Recommendations

• Enable verbose logging on the Hotel Guest Hotspot application and database server to capture detailed request information
• Configure alerting for failed authentication attempts and unusual session activity
• Monitor for outbound data transfers from database servers that could indicate data exfiltration
• Implement regular log review processes focusing on guest network access patterns

How to Mitigate CVE-2025-4764

Immediate Actions Required

• Isolate affected Hotel Guest Hotspot systems from direct guest network access where possible
• Implement network segmentation to restrict database server access to only authorized application servers
• Deploy Web Application Firewall rules to block common SQL injection patterns
• Review and restrict user privileges on the hotspot management system to minimize impact of potential exploitation

Patch Information

As of the publication date, the vendor (Aida Computer Information Technology Inc.) was contacted early about this disclosure but did not respond in any way. Organizations using Hotel Guest Hotspot version 22012026 or earlier should contact the vendor directly for patch availability information.

In the absence of a vendor-provided patch, organizations should prioritize implementing compensating controls and consider migration to alternative solutions if the vendor remains unresponsive.

For additional advisory information, see the USOM Security Advisory TR-26-0001.

Workarounds

• Implement strict network segmentation to isolate Hotel Guest Hotspot systems from direct guest access
• Deploy a Web Application Firewall (WAF) configured with SQL injection prevention rules in front of the vulnerable application
• Restrict database user privileges to minimum required permissions, removing DROP, ALTER, and other destructive capabilities
• Implement additional authentication layers for administrative functions on the hotspot system

# Example network segmentation configuration (iptables)
# Restrict direct database access from guest network segments
iptables -A INPUT -s 10.0.0.0/24 -d 192.168.1.100 -p tcp --dport 3306 -j DROP
iptables -A INPUT -s 10.0.0.0/24 -d 192.168.1.100 -p tcp --dport 5432 -j DROP