CVE-2025-10621 is a SQL Injection vulnerability identified in version 1.0 of the SourceCodester Hotel Reservation System, specifically within the editroomimage.php file. The vulnerability arises from improper sanitization or validation of the 'ID' parameter, which is susceptible to malicious input manipulation. An attacker can exploit this flaw remotely without requiring authentication or user interaction, by injecting crafted SQL commands through the vulnerable parameter. This can lead to unauthorized access to the backend database, potentially allowing the attacker to read, modify, or delete sensitive data related to hotel reservations, room images, or user information. The vulnerability has a CVSS 4.0 base score of 6.9, categorized as medium severity, reflecting its network attack vector, low attack complexity, and no privileges or user interaction required. The impact on confidentiality, integrity, and availability is limited but present, as the vulnerability allows partial compromise of data but does not inherently lead to full system takeover or denial of service. No public exploits are currently known in the wild, but the vulnerability details have been publicly disclosed, increasing the risk of exploitation by opportunistic attackers. The lack of available patches or official fixes at the time of publication means affected organizations must rely on mitigation strategies until a vendor patch is released.

For European organizations using the SourceCodester Hotel Reservation System 1.0, this vulnerability poses a tangible risk to the confidentiality and integrity of reservation data and associated customer information. Compromise could lead to unauthorized disclosure of personal data, violating GDPR requirements and potentially resulting in regulatory penalties and reputational damage. Additionally, manipulation of reservation or room image data could disrupt business operations and customer trust. Since the vulnerability can be exploited remotely without authentication, attackers from anywhere could target these systems, increasing the threat landscape. The medium severity rating indicates that while the impact is significant, it may not lead to full system compromise or widespread service disruption. However, given the hospitality sector's reliance on customer trust and data protection, even moderate breaches can have outsized consequences. Organizations may also face indirect impacts such as increased incident response costs, legal liabilities, and loss of competitive advantage.

Given the absence of an official patch, European organizations should implement immediate compensating controls. These include: 1) Applying strict input validation and parameterized queries or prepared statements in the editroomimage.php script to prevent SQL injection; if source code modification is possible, developers should sanitize and validate all user inputs rigorously. 2) Deploying Web Application Firewalls (WAFs) configured to detect and block SQL injection patterns targeting the 'ID' parameter. 3) Restricting network access to the hotel reservation system to trusted IP ranges and enforcing strong network segmentation to limit exposure. 4) Monitoring logs for unusual database query patterns or repeated failed attempts indicative of injection attempts. 5) Conducting thorough security assessments and penetration testing focused on injection vectors. 6) Planning for an urgent update or migration to a patched version once available from the vendor. 7) Ensuring regular backups of reservation data to enable recovery in case of data tampering. These measures go beyond generic advice by focusing on specific code-level fixes, network controls, and monitoring tailored to this vulnerability's characteristics.