CVE-2025-0645 is a vulnerability classified under CWE-434, indicating an unrestricted upload of files with dangerous types in the Pyxis Signage product developed by Narkom Communication and Software Technologies Trade Ltd. Co. The flaw allows an attacker who already has high-level privileges (PR:H) to bypass access control lists (ACLs) and upload malicious files remotely (AV:N) without requiring user interaction (UI:N). The vulnerability affects all versions up to 31 January 2025 and has a CVSS v3.1 base score of 7.2, reflecting high severity. The core issue is that the application does not properly restrict the types of files that can be uploaded, enabling an attacker to place executable or otherwise harmful files on the system. This can lead to full compromise of confidentiality, integrity, and availability (C:H/I:H/A:H), as attackers may execute arbitrary code, manipulate signage content, or disrupt service. Although no public exploits are known yet, the vulnerability's nature and ease of exploitation by privileged users make it a significant risk. The lack of patches at the time of reporting necessitates immediate mitigation through access control hardening and monitoring.

For European organizations, especially those using Pyxis Signage in critical environments such as transportation hubs, retail chains, or public information systems, this vulnerability poses a serious risk. Exploitation could lead to unauthorized code execution, data leakage, defacement of digital signage content, or denial of service, potentially disrupting operations and damaging reputation. Given the high confidentiality, integrity, and availability impact, attackers could leverage this flaw to pivot into broader network compromise or sabotage. The requirement for high privileges means insider threats or compromised administrative accounts are the most likely vectors. However, once exploited, the consequences could affect large user bases and critical infrastructure, making it a priority for security teams in Europe to address.

Organizations should immediately review and tighten access controls to ensure that only fully trusted administrators have upload privileges in Pyxis Signage. Network segmentation should isolate signage systems from critical infrastructure to limit lateral movement. Implement application-layer filtering or web application firewalls (WAFs) to detect and block suspicious file uploads. Monitor logs for unusual upload activity or attempts to upload executable file types. Employ file integrity monitoring on signage servers to detect unauthorized changes. Until an official patch is released, consider disabling file upload functionality if feasible or restricting it to safe file types through custom validation. Conduct regular audits of user privileges and enforce strong authentication mechanisms for administrative access. Finally, prepare for rapid deployment of patches once available from the vendor.