CVE-2025-11107 identifies a SQL injection vulnerability in the Simple Scheduling System version 1.0 developed by code-projects. The vulnerability resides in the /schedulingsystem/addcourse.php script, where the corcode parameter is improperly sanitized, allowing an attacker to inject malicious SQL commands. This flaw can be exploited remotely without authentication or user interaction, making it accessible to any attacker with network access to the affected system. Exploitation could allow attackers to read, modify, or delete sensitive scheduling data stored in the backend database, potentially compromising the confidentiality and integrity of organizational data. The vulnerability does not require privileges or user interaction, increasing its risk profile. Although no active exploits have been observed in the wild, a public exploit is available, which could facilitate automated attacks or targeted exploitation. The CVSS 4.0 base score of 6.9 reflects a medium severity, considering the network attack vector, low complexity, and lack of required privileges. The vulnerability affects only version 1.0 of the product, and no official patches have been linked yet, indicating that organizations must implement interim mitigations. The lack of scope change means the impact is confined to the affected component, but the potential for data compromise remains significant. This vulnerability highlights the importance of secure coding practices such as input validation and parameterized queries in web applications handling critical scheduling data.

For European organizations, this vulnerability could lead to unauthorized access and manipulation of scheduling data, which may include sensitive information about courses, personnel, and resource allocations. Educational institutions, training centers, and businesses relying on the Simple Scheduling System for operational planning are at risk of data breaches, service disruption, and reputational damage. The compromise of scheduling data could also facilitate further attacks, such as social engineering or insider threat exploitation. Given the remote and unauthenticated nature of the exploit, attackers could leverage this vulnerability to gain a foothold within the network or exfiltrate confidential information. The medium severity rating suggests moderate impact, but the availability of a public exploit increases the urgency for mitigation. Additionally, disruption to scheduling systems can affect operational continuity, especially in sectors where precise timing and resource management are critical. European data protection regulations, such as GDPR, impose strict requirements on data security, and exploitation of this vulnerability could lead to regulatory penalties and legal consequences if personal data is exposed.

European organizations should immediately audit their use of the Simple Scheduling System version 1.0 and assess exposure to the vulnerable endpoint. Since no official patch is currently available, implement the following mitigations: 1) Apply strict input validation and sanitization on the corcode parameter to reject malicious SQL payloads. 2) Refactor the application code to use parameterized queries or prepared statements to prevent SQL injection. 3) Restrict network access to the scheduling system, limiting it to trusted internal IP ranges or VPN connections. 4) Monitor web server and database logs for suspicious activity related to the addcourse.php endpoint. 5) Employ Web Application Firewalls (WAFs) with rules designed to detect and block SQL injection attempts targeting this parameter. 6) Conduct security awareness training for administrators to recognize signs of exploitation. 7) Plan for an upgrade or replacement of the vulnerable software version once a patch or secure alternative is available. 8) Regularly back up scheduling data and test restoration procedures to minimize impact in case of compromise.