CVE-2025-11106 is a SQL Injection vulnerability identified in version 1.0 of the code-projects Simple Scheduling System, specifically within the /schedulingsystem/addfaculty.php file. The vulnerability arises from improper sanitization or validation of the 'falname' parameter, which is directly used in SQL queries. This flaw allows an unauthenticated remote attacker to inject malicious SQL code, potentially manipulating the backend database. The attack vector requires no authentication or user interaction, making exploitation straightforward if the system is accessible over the network. The CVSS 4.0 score of 6.9 (medium severity) reflects the vulnerability's potential to impact confidentiality, integrity, and availability, albeit with limited scope and no privilege requirements. Exploitation could lead to unauthorized data access, data modification, or disruption of scheduling system operations. Although no public exploits are currently known in the wild, the disclosure of the vulnerability increases the risk of exploitation attempts. The affected product is a scheduling system likely used in organizational environments to manage faculty or resource scheduling, making the integrity and availability of the system critical for operational continuity.

For European organizations using the Simple Scheduling System 1.0, this vulnerability poses a tangible risk to the confidentiality and integrity of scheduling data, which may include sensitive personnel information and organizational resource allocations. Successful exploitation could lead to unauthorized data disclosure, manipulation of scheduling records, or denial of service, disrupting operational workflows. In sectors such as education, healthcare, or public administration, where scheduling systems are integral, such disruptions could have cascading effects on service delivery and compliance with data protection regulations like GDPR. The remote and unauthenticated nature of the exploit increases the threat level, especially for organizations exposing the scheduling system to external networks or lacking adequate network segmentation and monitoring.

Organizations should immediately assess their exposure to the Simple Scheduling System 1.0, particularly instances accessible over public or untrusted networks. As no official patch links are provided, mitigation should focus on implementing input validation and sanitization for the 'falname' parameter to prevent SQL injection. Employing Web Application Firewalls (WAFs) with SQL injection detection rules can provide a temporary protective layer. Network-level controls should restrict access to the scheduling system to trusted internal IPs only. Additionally, organizations should conduct code reviews and penetration testing to identify and remediate similar injection points. Monitoring database logs for anomalous queries and setting up alerting for suspicious activities can aid in early detection of exploitation attempts. Planning for an upgrade or replacement of the vulnerable system with a secured version or alternative solution is advisable once available.