CVE-2025-11403 identifies a SQL injection vulnerability in the SourceCodester Hotel and Lodge Management System version 1.0, specifically within the /del_booking.php script. The vulnerability stems from insufficient input validation of the 'ID' parameter, which is used in SQL queries without proper sanitization or parameterization. This flaw allows remote attackers to inject arbitrary SQL commands by manipulating the ID argument, potentially leading to unauthorized access, data leakage, or modification of the underlying database. The attack vector is network-based (AV:N), requires low attack complexity (AC:L), and does not require authentication (PR:L) or user interaction (UI:N). The vulnerability impacts confidentiality, integrity, and availability at a low level (VC:L, VI:L, VA:L), indicating partial but significant compromise potential. Although no known exploits are currently active in the wild, the public disclosure of exploit details increases the likelihood of exploitation attempts. The affected product is a niche hotel and lodge management system, which may be deployed in small to medium hospitality businesses. The lack of available patches necessitates immediate mitigation efforts by users. The CVSS 4.0 score of 5.3 classifies this as a medium-severity vulnerability, reflecting the balance between ease of exploitation and the limited scope of impact due to required privileges and partial impact on data security.

For European organizations, especially those in the hospitality sector using the SourceCodester Hotel and Lodge Management System, this vulnerability poses a risk of unauthorized database access, potentially exposing sensitive customer and booking information. Exploitation could lead to data breaches, loss of customer trust, regulatory penalties under GDPR, and operational disruptions if booking data is altered or deleted. The ability to remotely exploit the vulnerability without user interaction increases the risk of automated attacks. Given the hospitality industry's importance to many European economies, particularly in countries with high tourism volumes, the impact could extend to reputational damage and financial losses. Additionally, compromised systems could be leveraged as footholds for further network intrusion or lateral movement within organizational IT infrastructure. The medium severity indicates that while the threat is serious, it may not lead to complete system compromise without additional vulnerabilities or misconfigurations.

Organizations should immediately conduct a thorough code audit of the /del_booking.php file and any other database interaction points to identify and remediate SQL injection vulnerabilities. Implement parameterized queries or prepared statements to ensure that user inputs are properly sanitized and cannot alter SQL logic. Restrict database user permissions to the minimum necessary, avoiding elevated privileges that could exacerbate impact. Monitor database logs and application behavior for unusual queries or access patterns indicative of exploitation attempts. If possible, isolate the affected system from critical network segments until remediation is complete. Engage with the vendor or community to obtain or develop patches addressing this vulnerability. Additionally, implement web application firewalls (WAFs) with SQL injection detection rules as a temporary protective measure. Regularly update and test backups to ensure rapid recovery in case of data tampering or loss. Finally, educate staff about the risks and signs of exploitation to enhance detection and response capabilities.