CVE-2025-4889 is a buffer overflow vulnerability identified in version 1.0 of the code-projects Tourism Management System, specifically within the AddUser function of the User Registration component. The vulnerability arises from improper handling of the username and password input parameters, which can be manipulated to cause a buffer overflow condition. This type of vulnerability can lead to memory corruption, potentially allowing an attacker to execute arbitrary code, crash the application, or escalate privileges. However, exploitation requires local access to the system, meaning the attacker must already have some level of access to the host machine. No user interaction or authentication beyond local access is necessary. The vulnerability has been publicly disclosed but there are no known exploits actively used in the wild at this time. The CVSS 4.0 base score is 4.8, indicating a medium severity level. The vector indicates low attack complexity and low privileges required, but the impact on confidentiality, integrity, and availability is limited to low. This suggests that while the vulnerability is exploitable, its impact is somewhat constrained, likely due to the requirement for local access and limited scope of the affected component. No patches or fixes have been linked yet, so mitigation currently relies on compensating controls and monitoring.

For European organizations using the code-projects Tourism Management System version 1.0, this vulnerability poses a moderate risk primarily in environments where local access controls are weak or where multiple users share access to the same systems. An attacker with local access could exploit the buffer overflow to execute arbitrary code, potentially leading to unauthorized privilege escalation or disruption of the tourism management application. This could result in data integrity issues, service outages, or unauthorized access to sensitive user registration data. Given the tourism sector's importance in many European economies, disruption or compromise of such systems could affect business operations and customer trust. However, the requirement for local access limits remote exploitation risks, reducing the likelihood of widespread attacks from external threat actors. Organizations with strict endpoint security, user access controls, and network segmentation will be less impacted. The lack of known active exploits further reduces immediate risk, but the public disclosure means attackers could develop exploits in the near future.

1. Restrict local access strictly to authorized personnel only, enforcing strong authentication and access controls on systems running the Tourism Management System. 2. Implement application whitelisting and endpoint protection solutions to detect and block suspicious activities that may attempt to exploit buffer overflow conditions. 3. Monitor system logs and user activity for unusual behavior indicative of exploitation attempts, especially around user registration functions. 4. If possible, isolate the Tourism Management System on dedicated machines or virtual environments with limited user access to reduce exposure. 5. Engage with the vendor or community to obtain patches or updates addressing this vulnerability as soon as they become available. 6. Conduct regular security assessments and code reviews focusing on input validation and buffer management in custom or third-party applications. 7. Educate local users about the risks of executing untrusted code or commands on systems hosting critical applications.