CVE-2025-59893 is a Cross-Site Request Forgery (CSRF) vulnerability identified in Flexense Sync Breeze Enterprise Server and Disk Pulse Enterprise version 10.4.18. The vulnerability stems from the lack of proper CSRF token implementation, which is a security mechanism designed to ensure that state-changing requests originate from legitimate users. In this case, an authenticated user can craft a malicious POST request targeting the '/rename_command?sid=' endpoint, manipulating the 'command_name' parameter to rename commands without the victim's consent. Since the application does not verify the origin or authenticity of such requests through CSRF tokens, attackers can exploit this by inducing another logged-in user to unknowingly execute these unauthorized actions. The vulnerability requires the attacker to have some level of authenticated access (low privileges) and the victim to interact with the malicious request (user interaction required). The CVSS 4.0 base score of 8.5 indicates a high severity, reflecting the vulnerability's potential to compromise confidentiality, integrity, and availability of the system. While no public exploits are currently known, the flaw presents a significant risk, especially in environments where multiple users have access to the Sync Breeze Enterprise Server or Disk Pulse Enterprise interfaces. The vulnerability was reserved in September 2025 and published in January 2026, with INCIBE as the assigner. The lack of patches at the time of reporting necessitates immediate attention from affected organizations.

For European organizations, this vulnerability poses a substantial risk, particularly in sectors relying on Flexense Sync Breeze Enterprise Server or Disk Pulse Enterprise for file synchronization and monitoring tasks. Successful exploitation can lead to unauthorized command renaming, potentially disrupting automated workflows, causing data integrity issues, or enabling further malicious activities within the enterprise environment. The compromise of command configurations can affect system availability and operational continuity. Since the vulnerability requires authenticated access, insider threats or compromised credentials can be leveraged by attackers to exploit this flaw. Given the high CVSS score and the critical nature of enterprise server operations, organizations in finance, manufacturing, government, and critical infrastructure sectors across Europe could face operational disruptions and data integrity challenges if this vulnerability is exploited. The absence of known exploits in the wild suggests a window for proactive mitigation, but the risk remains significant due to the ease of exploitation and potential impact.

1. Immediate mitigation should focus on restricting access to the Sync Breeze Enterprise Server and Disk Pulse Enterprise interfaces to trusted users only, employing network segmentation and firewall rules to limit exposure. 2. Implement web application firewalls (WAF) with custom rules to detect and block suspicious POST requests targeting the '/rename_command?sid=' endpoint or anomalous command renaming activities. 3. Enforce strong authentication mechanisms, including multi-factor authentication (MFA), to reduce the risk of credential compromise. 4. Monitor logs and audit trails for unusual command renaming actions or unexpected user behaviors indicative of CSRF exploitation attempts. 5. Engage with Flexense for official patches or updates addressing the CSRF vulnerability and apply them promptly once available. 6. Educate users about the risks of CSRF and encourage cautious behavior when interacting with links or requests while authenticated. 7. Where possible, implement additional CSRF protections at the application or proxy level, such as validating the Origin or Referer headers. 8. Regularly review and update security policies to incorporate lessons learned from this vulnerability and enhance overall application security posture.