CVE-2025-4062 is a stack-based buffer overflow vulnerability identified in version 1.0 of the code-projects Theater Seat Booking System, specifically within the 'cancel' function. The vulnerability arises from improper handling of the 'cancelcustomername' argument, which can be manipulated to overflow the stack buffer. This overflow can potentially overwrite adjacent memory, leading to undefined behavior such as application crashes or execution of arbitrary code. The attack vector is local, requiring the attacker to have local access to the host running the vulnerable software. No user interaction is needed beyond supplying the malicious input to the vulnerable function. Although the vulnerability is classified as medium severity with a CVSS 4.8 score, it poses risks primarily related to integrity and availability due to potential application crashes or code execution. The exploit has been publicly disclosed, but there are no known exploits currently observed in the wild. The vulnerability does not require authentication but does require local privileges, limiting its exploitation scope. The affected product is a niche theater seat booking system, which may be deployed in entertainment venues or cultural institutions. The lack of available patches or vendor advisories at this time increases the risk for organizations using this software. Given the local attack vector, exploitation is more likely in environments where untrusted users have local access or where the system is used in multi-user contexts without strict access controls.

For European organizations, the impact of CVE-2025-4062 depends on the deployment scale of the Theater Seat Booking System. Entities such as theaters, cinemas, and cultural event venues using this software could face service disruptions if exploited, potentially leading to denial of service or unauthorized code execution. This could result in operational downtime, loss of customer trust, and financial losses due to interrupted ticket sales. While the vulnerability does not directly expose sensitive data, the integrity of booking operations could be compromised, affecting reservation accuracy. Given the local access requirement, the threat is more significant in environments with shared or poorly controlled access to booking system terminals. Additionally, exploitation could be used as a foothold for lateral movement within an organization's internal network if the booking system is integrated with other IT infrastructure. The medium severity rating suggests moderate risk, but the public disclosure of the exploit code increases the urgency for mitigation. European organizations with high visitor volumes or critical cultural infrastructure may experience reputational damage if service interruptions occur during major events.

To mitigate CVE-2025-4062, European organizations should first identify all instances of the Theater Seat Booking System version 1.0 within their environment. Since no official patches are currently available, immediate mitigation should focus on restricting local access to the affected systems. Implement strict access controls to ensure only trusted personnel can interact with the booking system terminals. Employ application whitelisting and endpoint protection to detect and prevent exploitation attempts. Consider isolating the booking system on segmented network zones to limit potential lateral movement. If possible, replace or upgrade the software to a newer, unaffected version once available. In the interim, monitor system logs for unusual crashes or behavior indicative of buffer overflow exploitation. Conduct regular security awareness training for staff to recognize and report suspicious activity. Additionally, implement host-based intrusion detection systems (HIDS) that can detect anomalous memory or process behavior associated with buffer overflow attacks. For environments where local access cannot be fully restricted, consider deploying virtualization or containerization to sandbox the booking system, limiting the impact of any successful exploit.