CVE-2025-11108 identifies a SQL injection vulnerability in the Simple Scheduling System version 1.0 developed by code-projects. The vulnerability exists in the /schedulingsystem/addroom.php script, where the 'room' parameter is improperly sanitized before being used in SQL queries. This allows an attacker to craft malicious input that alters the intended SQL command, potentially leading to unauthorized data access, data modification, or denial of service. The vulnerability can be exploited remotely without authentication or user interaction, making it accessible to a wide range of attackers. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) indicates network attack vector, low attack complexity, no privileges or user interaction required, and partial impacts on confidentiality, integrity, and availability. Although no exploits have been reported in the wild yet, the public disclosure increases the risk of exploitation attempts. The affected software is a scheduling system likely used in organizational environments to manage room bookings and resources, making the underlying database a valuable target for attackers. The lack of vendor patches at the time of disclosure necessitates immediate mitigation through secure coding practices and monitoring.

For European organizations using the Simple Scheduling System 1.0, this vulnerability poses risks including unauthorized access to sensitive scheduling data, manipulation of booking information, and potential disruption of scheduling services. Confidentiality may be compromised if attackers extract sensitive information from the database. Integrity can be affected by unauthorized modification or deletion of scheduling entries, potentially leading to operational disruptions. Availability impacts may arise if attackers exploit the vulnerability to cause database errors or crashes. Organizations in sectors relying heavily on scheduling systems—such as education, healthcare, and corporate facilities management—may experience operational inefficiencies or reputational damage. The remote and unauthenticated nature of the exploit increases the attack surface, especially if the system is exposed to the internet without adequate network protections. The medium severity rating reflects the partial impact on CIA triad and the ease of exploitation, underscoring the need for timely remediation to prevent escalation or lateral movement within networks.

1. Immediately implement input validation and sanitization for the 'room' parameter in /schedulingsystem/addroom.php to reject or properly escape malicious SQL syntax. 2. Refactor the code to use parameterized queries or prepared statements to eliminate direct concatenation of user input into SQL commands. 3. Restrict network exposure of the scheduling system by placing it behind firewalls and limiting access to trusted internal networks or VPNs. 4. Monitor logs for unusual SQL errors or suspicious activity indicative of injection attempts. 5. Conduct a thorough code review of the entire application to identify and remediate similar injection flaws. 6. Engage with the vendor or community to obtain patches or updates addressing this vulnerability as soon as they become available. 7. Educate developers on secure coding practices to prevent future injection vulnerabilities. 8. Consider deploying Web Application Firewalls (WAFs) with SQL injection detection rules as an interim protective measure. 9. Regularly back up scheduling data and test restoration procedures to mitigate potential data loss from exploitation.