CVE-2024-58283 is a critical vulnerability classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) affecting WBCE CMS version 1.6.2. The vulnerability exists in the Elfinder file manager's connector, which improperly restricts file uploads, allowing authenticated users to upload files with dangerous extensions, specifically PHP scripts. This flaw enables attackers to upload a web shell, which can then be used to execute arbitrary system commands on the server hosting the CMS. The vulnerability does not require user interaction and can be exploited remotely over the network with low attack complexity and no need for elevated privileges beyond authentication. The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N) indicates network attack vector, low complexity, no user interaction, and high impact on confidentiality, integrity, and availability. Although no public exploits are currently reported, the vulnerability's nature makes it a prime candidate for exploitation once a proof-of-concept or exploit code becomes available. The vulnerability stems from insufficient validation and sanitization of uploaded files, allowing dangerous file types to be stored and executed on the server. This can lead to full system compromise, data theft, defacement, or use of the server as a pivot point for further attacks.

For European organizations, exploitation of CVE-2024-58283 could lead to severe consequences including unauthorized access to sensitive data, complete system compromise, and disruption of services. Organizations running WBCE CMS 1.6.2 with the Elfinder file manager exposed to the internet are particularly vulnerable. Attackers could leverage this flaw to deploy web shells, enabling persistent access and lateral movement within the network. This could result in data breaches affecting personal data protected under GDPR, leading to regulatory penalties and reputational damage. Critical sectors such as government, healthcare, education, and media using WBCE CMS may face operational disruptions and loss of trust. Additionally, compromised servers could be used to launch further attacks against European infrastructure or as part of botnets. The high impact on confidentiality, integrity, and availability underscores the urgency of addressing this vulnerability.

1. Immediately upgrade WBCE CMS to a version that patches this vulnerability once available. If no patch is currently released, consider disabling the Elfinder file manager or its file upload functionality temporarily. 2. Implement strict server-side validation to restrict file uploads to safe types only, explicitly blocking PHP and other executable file extensions. 3. Employ web application firewalls (WAFs) with rules designed to detect and block malicious file uploads and web shell activity. 4. Restrict access to the Elfinder file manager to trusted users and IP addresses only, using network segmentation and access controls. 5. Monitor web server logs and file system changes for signs of unauthorized uploads or command execution attempts. 6. Conduct regular security audits and penetration testing focusing on file upload functionalities. 7. Educate administrators and developers about secure file handling practices and the risks of unrestricted uploads. 8. Use application-level sandboxing or containerization to limit the impact of potential compromises. 9. Ensure backups are up-to-date and tested to enable recovery in case of compromise.