CVE-2026-2691 is a SQL Injection vulnerability identified in the itsourcecode Event Management System version 1.0. The vulnerability resides in the /admin/manage_register.php script, where the 'ID' parameter is improperly sanitized, allowing an attacker to inject malicious SQL commands. This injection can be performed remotely without requiring authentication or user interaction, making it highly accessible to threat actors. The vulnerability can lead to unauthorized data access, modification, or deletion within the backend database, potentially exposing sensitive event registration data or disrupting event management operations. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and partial impact on confidentiality, integrity, and availability (VC:L, VI:L, VA:L). Although no known exploits are currently active in the wild, the public disclosure of the exploit details increases the risk of exploitation. The lack of patches or vendor-provided fixes further elevates the urgency for organizations to implement mitigations. This vulnerability highlights the critical need for secure coding practices, especially input validation and the use of parameterized queries in web applications handling sensitive data.

For European organizations, exploitation of this vulnerability could result in unauthorized access to sensitive event registration data, including personal identifiable information (PII) of attendees, payment details, and internal event logistics. This could lead to data breaches violating GDPR regulations, resulting in significant legal and financial penalties. Integrity of event data could be compromised, causing misinformation or disruption in event management processes. Availability impacts could arise if attackers execute destructive SQL commands, leading to denial of service or data loss. The remote, unauthenticated nature of the attack increases the risk of widespread exploitation, especially in organizations relying heavily on this event management system. Additionally, reputational damage and loss of customer trust could occur if breaches become public. European entities involved in large-scale or government-related events are particularly at risk due to the strategic importance of their event data and the potential for targeted attacks.

1. Immediately restrict access to the /admin/manage_register.php interface using network-level controls such as IP whitelisting or VPN access to limit exposure. 2. Implement robust input validation and sanitization on the 'ID' parameter to reject any unexpected or malicious input. 3. Refactor the backend code to use parameterized queries or prepared statements to prevent SQL injection. 4. Conduct a comprehensive security audit of the entire application to identify and remediate similar injection flaws. 5. Monitor application logs for suspicious query patterns or repeated failed attempts targeting the 'ID' parameter. 6. If possible, isolate the event management system within a segmented network zone to reduce lateral movement risk. 7. Engage with the vendor or community to obtain patches or updates addressing this vulnerability. 8. Educate administrative users on the risks and signs of exploitation attempts. 9. Prepare an incident response plan specific to potential data breaches involving event management data. 10. Consider deploying Web Application Firewalls (WAF) with custom rules to detect and block SQL injection attempts targeting this endpoint.