CVE-2025-65806 is a critical vulnerability affecting the E-POINT CMS eagle.gsam-1169.1 version, specifically its file upload functionality. The vulnerability arises because the CMS does not properly handle nested ZIP archives during file extraction. An attacker can craft a ZIP file containing another ZIP archive, where the inner archive includes executable files such as webshell.php. When the CMS extracts these nested archives, it fails to validate the contents adequately and does not enforce restrictions on the extraction destination paths. Consequently, malicious executables can be placed into web-accessible directories, allowing attackers to execute arbitrary code remotely on the server. This remote code execution (RCE) can lead to severe consequences including unauthorized data access, user account compromise, and further system control depending on the privileges of the web server process. The vulnerability stems from insufficient input validation and lack of secure extraction mechanisms. Although no CVSS score has been assigned, the vulnerability is severe due to the direct path to RCE without requiring authentication or user interaction. No known exploits are currently reported in the wild, but the potential impact is significant. The absence of patch links indicates that a fix may not yet be available, emphasizing the need for immediate mitigation steps. This vulnerability highlights the risks of improper archive handling in web applications, especially CMS platforms that accept user-uploaded files.

For European organizations, this vulnerability poses a significant threat, particularly those using E-POINT CMS for public-facing websites or internal portals. Successful exploitation could lead to remote code execution, allowing attackers to deploy webshells and gain persistent access to affected servers. This can result in data breaches involving sensitive customer or employee information, disruption of services, and potential lateral movement within corporate networks. Organizations in sectors such as finance, healthcare, government, and critical infrastructure are at heightened risk due to the sensitive nature of their data and regulatory requirements like GDPR. The ability to execute arbitrary code remotely without authentication increases the attack surface and lowers the barrier for attackers. Additionally, compromised web servers can be used as pivot points for further attacks, including ransomware deployment or espionage. The lack of a patch at the time of disclosure means organizations must rely on mitigations to reduce exposure. Overall, the vulnerability could cause severe operational, financial, and reputational damage if exploited.

To mitigate CVE-2025-65806, organizations should implement multiple layers of defense: 1) Immediately restrict or disable file upload functionality in E-POINT CMS if not essential. 2) Enforce strict validation of uploaded archives, including scanning nested archives for executable files before extraction. 3) Configure the CMS or underlying extraction libraries to prohibit extraction of files outside designated safe directories, preventing placement in web-accessible paths. 4) Employ web application firewalls (WAFs) to detect and block suspicious file uploads and webshell activity. 5) Monitor web server directories for unexpected executable files and unusual file creation events. 6) Apply principle of least privilege to web server processes to limit the impact of potential code execution. 7) Stay alert for official patches or updates from E-POINT CMS vendors and apply them promptly once available. 8) Conduct regular security audits and penetration tests focusing on file upload features. 9) Educate developers and administrators about secure file handling practices to prevent similar vulnerabilities. These targeted measures go beyond generic advice by focusing on the specific weakness in nested archive extraction and the CMS environment.