CVE-2025-11404 identifies a SQL injection vulnerability in SourceCodester Hotel and Lodge Management System version 1.0, located in the /pages/save_tax.php script. The vulnerability stems from insufficient input validation of the 'percentage' parameter, which is directly used in SQL queries without proper sanitization or parameterization. This flaw enables remote attackers to inject malicious SQL code, potentially allowing them to read, modify, or delete database records. The attack vector requires no authentication or user interaction, making it accessible to any remote adversary with network access to the application. The CVSS 4.0 score of 5.3 reflects a medium severity, considering the vulnerability's partial impact on confidentiality, integrity, and availability, and the lack of required privileges. Although no exploits have been observed in the wild yet, the public disclosure of the vulnerability increases the risk of exploitation attempts. The affected product is typically deployed in hospitality environments to manage hotel and lodge operations, including tax calculations, reservations, and billing. Exploiting this vulnerability could lead to unauthorized access to sensitive customer data, financial records, or disruption of service availability. The absence of vendor patches or official remediation guidance necessitates immediate defensive measures by users. Organizations should audit their deployments, restrict access to the vulnerable endpoint, implement web application firewalls with SQL injection detection, and apply input validation controls. Additionally, monitoring database logs for anomalous queries can help detect exploitation attempts. Given the product's niche market, the impact is limited to entities using this specific system, but the hospitality sector's reliance on accurate tax and billing data makes this vulnerability significant for affected users.

For European organizations, the impact of CVE-2025-11404 could be substantial in sectors relying on the SourceCodester Hotel and Lodge Management System, primarily hospitality businesses such as hotels, lodges, and resorts. Successful exploitation may lead to unauthorized disclosure of customer personal and payment information, undermining data confidentiality and potentially violating GDPR regulations, resulting in legal and financial penalties. Integrity of financial and tax data could be compromised, leading to incorrect billing or tax reporting, which can disrupt business operations and damage reputation. Availability impacts may arise if attackers manipulate or delete critical database records, causing service outages or degraded functionality. The medium CVSS score indicates moderate risk, but the ease of remote exploitation without authentication increases urgency. European organizations with limited cybersecurity resources or lacking timely patch management may be particularly vulnerable. Furthermore, the hospitality sector's importance to European economies, especially in tourism-heavy countries, elevates the threat's potential operational and economic consequences.

1. Conduct an immediate code audit of the /pages/save_tax.php file to identify and remediate the SQL injection vulnerability by implementing parameterized queries or prepared statements for the 'percentage' parameter. 2. If vendor patches become available, apply them promptly. 3. Deploy Web Application Firewalls (WAFs) configured to detect and block SQL injection attempts targeting the affected endpoint. 4. Restrict network access to the management system to trusted IP addresses and internal networks where feasible, reducing exposure to remote attackers. 5. Implement rigorous input validation and sanitization on all user-supplied data, especially numeric inputs like percentages. 6. Monitor database and application logs for unusual query patterns or errors indicative of injection attempts. 7. Educate IT and security teams about this vulnerability to ensure rapid detection and response. 8. Consider isolating the affected system within segmented network zones to limit lateral movement in case of compromise. 9. Regularly back up critical data and verify restoration procedures to minimize downtime and data loss if exploitation occurs. 10. Review compliance with GDPR and other data protection regulations to prepare for potential incident response and notification requirements.