CVE-2026-3711 identifies a SQL injection vulnerability in the Simple Flight Ticket Booking System version 1.0 developed by code-projects. The vulnerability resides in an unspecified function within the /Adminupdate.php file, where multiple input parameters related to flight details (flightno, airplaneid, departure, dtime, arrival, atime, ec, ep, bc, bp) are improperly sanitized or validated before being incorporated into SQL queries. This allows an attacker with high privileges to remotely inject malicious SQL code, potentially manipulating the backend database. The vulnerability does not require user interaction but does require authentication with elevated privileges, limiting the attack surface. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no user interaction (UI:N), and high privileges required (PR:H). The impact on confidentiality, integrity, and availability is low to limited, suggesting partial data exposure or modification rather than full system compromise. No patches or fixes have been linked yet, and while exploit code is public, no active exploitation has been reported. This vulnerability highlights the risks of insufficient input validation in web applications managing critical flight booking data.

The SQL injection vulnerability could allow an authenticated attacker with high privileges to execute arbitrary SQL commands on the backend database, leading to unauthorized data access, modification, or deletion. This could compromise sensitive flight booking information, customer data, and operational records. Although the impact is rated medium due to the requirement for high privileges and limited scope, exploitation could disrupt booking operations, damage data integrity, and erode customer trust. Organizations relying on this system may face regulatory compliance issues if customer data is exposed. The availability of public exploit code increases the risk of future attacks, especially if the system remains unpatched. The vulnerability could also serve as a foothold for further lateral movement within the network.

To mitigate this vulnerability, organizations should immediately review and sanitize all inputs to the /Adminupdate.php script, especially the parameters flightno, airplaneid, departure, dtime, arrival, atime, ec, ep, bc, and bp. Implement parameterized queries or prepared statements to prevent SQL injection. Restrict access to the administrative interface to trusted IP addresses and enforce strong authentication and authorization controls to limit high-privilege access. Conduct a thorough code audit of the booking system to identify and remediate similar injection flaws. Monitor logs for suspicious database queries or unusual admin activity. If patches become available from the vendor, apply them promptly. Additionally, consider deploying web application firewalls (WAFs) with SQL injection detection rules tailored to this application’s traffic patterns. Regularly back up databases and test recovery procedures to minimize impact from potential data corruption.