CVE-2025-67077 is a file upload vulnerability classified under CWE-434 affecting Omnispace Agora Project versions prior to 25.10. The vulnerability arises from insufficient validation and sanitization of files uploaded via the UploadTmpFile action. Authenticated users can exploit this flaw to upload arbitrary files, and under certain conditions, even guest users may exploit it. The vulnerability allows attackers to upload malicious files, potentially leading to remote code execution, data exfiltration, or system compromise. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability (C:H/I:H/A:H), with network attack vector (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), and no user interaction (UI:N). The scope is unchanged (S:U), indicating the vulnerability affects the same security scope. No patches are currently linked, and no known exploits have been reported in the wild as of the publication date. However, the vulnerability's nature makes it a prime candidate for exploitation once weaponized. The UploadTmpFile action likely handles temporary file uploads, and improper controls can allow attackers to upload web shells or other malicious payloads. This can lead to full system compromise, lateral movement, or persistent access. The vulnerability is particularly dangerous because it can be exploited remotely over the network with minimal prerequisites, increasing the attack surface significantly.

For European organizations, this vulnerability poses a severe threat, especially those using Omnispace Agora Project in critical sectors such as telecommunications, government, finance, and infrastructure. Successful exploitation can lead to unauthorized access to sensitive data, disruption of services, and potential ransomware deployment. The ability for guest users to exploit the vulnerability under certain conditions increases the risk of external attackers gaining foothold without authentication. This can result in data breaches, loss of customer trust, regulatory penalties under GDPR, and operational downtime. Organizations with internet-facing Omnispace Agora Project instances are particularly vulnerable. The high severity score indicates that the confidentiality, integrity, and availability of systems can be fully compromised, potentially affecting large-scale deployments and interconnected systems across European networks.

Immediate mitigation steps include: 1) Monitoring Omnispace Agora Project vendor communications for official patches and applying them promptly once available. 2) Implementing strict access controls to restrict file upload functionality to trusted authenticated users only, and disabling guest upload capabilities if possible. 3) Employing robust file validation mechanisms, including whitelisting allowed file types, scanning uploads for malware, and enforcing size limits. 4) Using web application firewalls (WAFs) to detect and block suspicious upload attempts targeting the UploadTmpFile action. 5) Conducting thorough security audits and penetration testing focused on file upload functionalities. 6) Isolating the application environment to limit the impact of potential compromise, such as running the service in containers or sandboxed environments. 7) Enhancing logging and monitoring to detect anomalous upload activities promptly. 8) Educating administrators and users about the risks and signs of exploitation. These measures go beyond generic advice by focusing on the specific vulnerable action and the conditions under which guest users may exploit the vulnerability.