CVE-2025-2747 is a critical authentication bypass vulnerability identified in Kentico Xperience, a widely used content management and digital experience platform. The vulnerability specifically resides in the Staging Sync Server component's password handling mechanism when the server is configured with the 'None' password type. This flaw allows an attacker to bypass authentication controls entirely without requiring any credentials or user interaction. Exploiting this vulnerability enables the attacker to gain unauthorized administrative access, thereby allowing full control over administrative objects within the Kentico Xperience environment. The vulnerability is classified under CWE-288, which pertains to authentication bypass using alternate paths or channels. The CVSS v3.1 base score of 9.8 reflects the critical severity, indicating high impact on confidentiality, integrity, and availability, with network attack vector, no privileges required, and no user interaction needed. This vulnerability affects all versions of Kentico Xperience up to and including 13.0.178. No public exploits have been reported yet, but the critical nature and ease of exploitation make it a significant risk for organizations using this platform. The lack of available patches at the time of reporting further increases the urgency for mitigation.

For European organizations utilizing Kentico Xperience, this vulnerability poses a severe risk. Given that the attacker can bypass authentication without any credentials, they can gain administrative privileges, potentially leading to full compromise of the affected systems. This can result in unauthorized data access, modification, or deletion, disruption of digital services, and potential defacement or manipulation of web content. The breach of confidentiality can expose sensitive customer or business data, leading to regulatory non-compliance issues under GDPR and other data protection laws prevalent in Europe. Integrity and availability impacts could disrupt business operations and damage organizational reputation. Since Kentico Xperience is used by various enterprises, including government agencies, educational institutions, and commercial entities across Europe, the threat could have widespread consequences. The absence of known exploits in the wild currently offers a limited window for proactive defense, but the critical severity demands immediate attention to prevent potential exploitation.

European organizations should immediately assess their use of Kentico Xperience, specifically versions up to 13.0.178. Until an official patch is released, organizations should consider the following mitigations: 1) Disable or restrict access to the Staging Sync Server component, especially if the 'None' password type is configured, to prevent exploitation via this vector. 2) Implement network-level controls such as firewall rules or VPN restrictions to limit access to the Kentico Xperience administrative interfaces and staging components to trusted internal IP addresses only. 3) Monitor logs and network traffic for unusual or unauthorized access attempts targeting the staging sync functionality. 4) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious authentication bypass attempts. 5) Prepare for rapid deployment of patches once Kentico releases an official fix by maintaining close vendor communication. 6) Conduct internal audits and penetration testing focused on authentication mechanisms within Kentico Xperience to identify any other potential weaknesses. 7) Educate IT and security teams about this vulnerability to ensure swift incident response if exploitation attempts are detected.