CVE-2025-67523 is a critical security vulnerability classified as Remote File Inclusion (RFI) in the trippleS Exhibz software, a PHP-based event and exhibition management platform. The vulnerability stems from improper control over the filename parameter used in PHP include or require statements, which allows an attacker to supply a remote file path. When the application includes this attacker-controlled file, it can execute arbitrary PHP code on the server. This leads to a full compromise of the affected system, including unauthorized disclosure of sensitive information, modification or deletion of data, and potential disruption of service. The vulnerability affects all versions of Exhibz up to and including 3.0.9. The CVSS v3.1 base score is 9.8, indicating critical severity with attack vector as network (no local access needed), low attack complexity, no privileges required, and no user interaction necessary. The scope is unchanged, but the impacts on confidentiality, integrity, and availability are all high. Although no public exploits are currently known, the nature of RFI vulnerabilities and the widespread use of PHP in web applications make this a high-risk issue. The vulnerability was published on December 9, 2025, and no official patches or mitigation links are currently provided, emphasizing the need for immediate defensive measures.

For European organizations, exploitation of CVE-2025-67523 could result in complete system takeover of servers running Exhibz, leading to severe data breaches, unauthorized access to sensitive event-related information, and disruption of business operations. This is particularly critical for organizations managing large-scale exhibitions, conferences, or trade shows where Exhibz is deployed. Confidentiality breaches could expose personal data of attendees and exhibitors, violating GDPR requirements and resulting in legal and financial penalties. Integrity and availability impacts could disrupt event management services, causing reputational damage and operational losses. Given the critical severity and ease of exploitation, attackers could leverage this vulnerability for ransomware deployment, espionage, or as a foothold for further network compromise within European enterprises.

European organizations should immediately audit their use of trippleS Exhibz and identify affected versions (<= 3.0.9). Until an official patch is released, implement strict input validation and sanitization on all parameters used in include or require statements to prevent remote file paths. Employ web application firewalls (WAFs) with rules to detect and block attempts to exploit file inclusion vulnerabilities. Disable allow_url_include and allow_url_fopen directives in PHP configurations to prevent remote file inclusion. Restrict file system permissions to limit the web server's ability to execute or include files outside designated directories. Monitor logs for suspicious requests targeting include parameters. Engage with the vendor for timely patch releases and apply updates as soon as they become available. Conduct penetration testing focused on file inclusion vectors to verify mitigation effectiveness.