CVE-2025-12593 is a vulnerability identified in version 2.0 of the Simple Online Hotel Reservation System developed by code-projects. The flaw exists in the Photo Handler functionality within the /admin/edit_room.php file, which improperly restricts file uploads. This unrestricted upload vulnerability allows an attacker with high privileges to remotely upload arbitrary files, potentially including malicious scripts or web shells. The vulnerability is exploitable over the network without requiring user interaction, but it does require the attacker to have high-level privileges, such as administrative access to the system. The CVSS 4.0 base score is 5.1, reflecting medium severity, with attack vector network (AV:N), low attack complexity (AC:L), no authentication required (AT:N), but requiring high privileges (PR:H). The impact on confidentiality, integrity, and availability is low to moderate, as the attacker could upload files that may lead to further compromise or service disruption. Although no active exploitation in the wild has been reported, a public exploit is available, increasing the risk of future attacks. The vulnerability highlights the need for proper input validation and secure file handling in web applications, especially those managing critical business functions like hotel reservations.

For European organizations, particularly those in the hospitality and tourism sectors using the affected Simple Online Hotel Reservation System 2.0, this vulnerability could lead to unauthorized file uploads that compromise system integrity and availability. Attackers could deploy web shells or malware, leading to data breaches, service interruptions, or lateral movement within the network. This could result in loss of customer trust, regulatory penalties under GDPR for data breaches, and operational downtime. Since the vulnerability requires high privileges, the initial compromise vector might be through credential theft or insider threats. The impact is more pronounced for organizations relying heavily on this software for booking and customer management, as disruption could affect revenue and reputation. Additionally, the presence of a public exploit increases the likelihood of targeted attacks, necessitating urgent mitigation.

1. Immediately restrict file upload permissions to only trusted administrators and implement role-based access controls to minimize high privilege access. 2. Apply any available patches or updates from the vendor as soon as they are released. 3. Implement strict server-side validation of uploaded files, including checking file types, sizes, and content signatures to prevent malicious uploads. 4. Use allowlists for acceptable file extensions and reject all others. 5. Store uploaded files outside the webroot or in directories with no execute permissions to prevent execution of malicious scripts. 6. Monitor upload directories and web server logs for unusual activity or unauthorized file uploads. 7. Employ web application firewalls (WAFs) with rules to detect and block suspicious upload attempts. 8. Conduct regular security audits and penetration testing focused on file upload functionalities. 9. Educate administrators on secure handling of file uploads and the risks of privilege misuse. 10. Implement multi-factor authentication and strong password policies to reduce risk of privilege escalation.