CVE-2025-65783 is an arbitrary file upload vulnerability identified in the /utils/uploadFile component of Hubert Imoveis e Administracao Ltda Hub version 2.0 1.27.3. This vulnerability allows an unauthenticated remote attacker to upload a specially crafted PDF file, which the application improperly handles, leading to arbitrary code execution on the server. The root cause is inadequate validation and sanitization of uploaded files, classified under CWE-434 (Unrestricted Upload of File with Dangerous Type). The vulnerability requires no privileges and no user interaction, making it highly exploitable over the network. Successful exploitation compromises the confidentiality, integrity, and availability of the affected system, potentially allowing attackers to execute arbitrary commands, access sensitive data, or disrupt services. The CVSS v3.1 base score is 9.8, reflecting the critical nature of this flaw. Although no public exploits are currently known, the vulnerability's characteristics suggest it could be weaponized rapidly. The affected product is a real estate and administration management platform, which may contain sensitive client and business data, increasing the attractiveness of this target for attackers. The lack of available patches at the time of disclosure necessitates immediate compensating controls to mitigate risk.

For European organizations, especially those in real estate, property management, and administrative sectors using Hubert Imoveis e Administracao Ltda Hub v2.0 1.27.3, this vulnerability poses a severe risk. Exploitation can lead to full system compromise, data breaches involving personal and financial information, disruption of business operations, and potential regulatory non-compliance under GDPR due to unauthorized data access. The ability to execute arbitrary code remotely without authentication increases the likelihood of widespread attacks, ransomware deployment, or lateral movement within corporate networks. Given the criticality and ease of exploitation, organizations could face significant financial losses, reputational damage, and legal consequences. The impact extends beyond individual companies to their clients and partners, amplifying the threat landscape in Europe.

Since no official patches are currently available, European organizations should immediately implement the following mitigations: 1) Restrict access to the /utils/uploadFile endpoint using network-level controls such as firewalls or VPNs to limit exposure. 2) Implement strict file upload validation on the server side, including verifying file type, size, and content signatures beyond file extensions. 3) Employ web application firewalls (WAFs) with custom rules to detect and block malicious upload attempts. 4) Monitor logs and network traffic for suspicious upload activities or anomalous behavior. 5) Isolate the affected application servers in segmented network zones to limit potential lateral movement. 6) Conduct thorough security assessments and penetration testing focused on file upload functionalities. 7) Prepare incident response plans to quickly address potential exploitation. Organizations should also maintain close communication with the vendor for timely patch releases and updates.