CVE-2025-65783 is a critical vulnerability identified in the Hubert Imoveis e Administracao Ltda Hub software version 2.0 1.27.3, specifically in the /utils/uploadFile component. The flaw allows an attacker to upload arbitrary files, including maliciously crafted PDF files, which can be executed on the server, leading to arbitrary code execution. This type of vulnerability typically arises from insufficient validation or sanitization of uploaded files, enabling attackers to bypass security controls and execute code remotely. The vulnerability does not require authentication or user interaction, which significantly lowers the barrier for exploitation. Although no public exploits have been reported yet, the potential impact includes full system compromise, data theft, and disruption of services. The lack of a CVSS score suggests the vulnerability is newly published, but its characteristics align with high-severity remote code execution flaws. The affected software is used in real estate and administrative management, which often handles sensitive client data and critical business operations. Attackers exploiting this vulnerability could gain persistent access, manipulate data, or use the compromised system as a pivot point for further attacks within an organization’s network. The absence of patch links indicates that a fix may not yet be available, emphasizing the need for immediate mitigations and monitoring.

For European organizations, especially those in the real estate and property management sectors using Hubert Imoveis e Administracao Ltda Hub software, this vulnerability poses a significant risk. Successful exploitation could lead to unauthorized access to sensitive client and business data, operational disruptions, and potential regulatory non-compliance under GDPR due to data breaches. The arbitrary code execution capability means attackers could install malware, ransomware, or create backdoors, threatening confidentiality, integrity, and availability of systems. Given the critical nature of real estate data and administrative functions, the impact could extend to financial losses, reputational damage, and legal consequences. Additionally, compromised systems could be leveraged to launch further attacks within European networks, amplifying the threat. Organizations relying on this software must consider the vulnerability a high priority for risk management and incident response planning.

1. Immediately implement strict file upload validation controls to restrict allowed file types and verify file contents beyond extensions, such as MIME type and file signatures. 2. Employ web application firewalls (WAFs) with rules to detect and block malicious file uploads targeting the /utils/uploadFile endpoint. 3. Isolate the upload functionality in a segregated environment with minimal privileges to limit the impact of potential exploitation. 4. Monitor logs and network traffic for unusual activity related to file uploads and execution attempts. 5. Apply principle of least privilege to the application and underlying system accounts to reduce the potential damage from code execution. 6. Regularly update and patch the software once a vendor fix is released; coordinate with the vendor for timelines and interim workarounds. 7. Conduct security assessments and penetration testing focused on file upload mechanisms to identify and remediate weaknesses proactively. 8. Educate staff about the risks associated with file uploads and enforce policies to avoid uploading untrusted files.