CVE-2024-27480 identifies a critical insecure file upload vulnerability in givanz VvvebJs version 1.7.2. VvvebJs is a web-based drag-and-drop website builder framework that allows users to create and edit web pages visually. The vulnerability arises from insufficient validation and sanitization of uploaded files, allowing attackers to upload arbitrary files, including malicious scripts or executables. This can lead to remote code execution, complete system compromise, data theft, or service disruption. The CVSS 3.1 base score of 9.8 reflects the vulnerability's ease of exploitation (network vector, no privileges or user interaction required) and its severe impact on confidentiality, integrity, and availability. The CWE-434 classification highlights the core issue of improper file upload handling. No patches or fixes have been published yet, increasing the urgency for organizations to implement compensating controls. Although no known exploits have been observed in the wild, the vulnerability's characteristics make it a prime target for attackers aiming to compromise web servers running VvvebJs 1.7.2. The lack of authentication requirements means any remote attacker can attempt exploitation, increasing the attack surface significantly.

For European organizations, this vulnerability poses a severe risk, especially for those deploying VvvebJs 1.7.2 in public-facing web applications. Successful exploitation can lead to unauthorized access to sensitive data, defacement or destruction of websites, and potential lateral movement within internal networks. Critical sectors such as finance, government, healthcare, and telecommunications could suffer data breaches or operational disruptions. The vulnerability's ability to compromise confidentiality, integrity, and availability simultaneously makes it a high-impact threat. Additionally, the absence of patches means organizations must rely on immediate mitigations to prevent exploitation. The potential for attackers to gain persistent access or deploy ransomware further elevates the threat level. Given the widespread use of web development frameworks in Europe, the vulnerability could affect a broad range of organizations, increasing the risk of large-scale incidents.

1. Immediately audit all web applications using VvvebJs 1.7.2 to identify exposure to the vulnerable file upload functionality. 2. Disable file upload features in VvvebJs if they are not essential to the application’s operation. 3. Implement strict server-side validation of uploaded files, including checking file type, size, and content signatures to prevent malicious files. 4. Employ allow-listing of acceptable file extensions and reject all others. 5. Use sandboxing or isolated environments to handle file uploads, preventing direct execution on production servers. 6. Monitor web server logs and network traffic for unusual upload patterns or execution attempts. 7. Apply web application firewalls (WAFs) with custom rules to detect and block suspicious upload requests. 8. Prepare incident response plans specifically addressing potential exploitation of file upload vulnerabilities. 9. Stay alert for official patches or updates from the VvvebJs maintainers and apply them promptly once available. 10. Educate developers and administrators about secure file handling practices to prevent similar vulnerabilities in the future.