CVE-2025-2794 is an unsafe reflection vulnerability classified under CWE-470 found in Kentico Xperience, a widely used digital experience platform. Unsafe reflection occurs when an application uses externally-supplied input to dynamically select and instantiate classes or execute code without proper validation, leading to security risks. In this case, the vulnerability allows an unauthenticated attacker to send crafted input that causes the application to reflectively load or execute unintended code paths, ultimately killing the current process. This results in a denial-of-service (DoS) condition, disrupting the availability of the affected service. The vulnerability affects Kentico Xperience versions up to 13.0.180. The CVSS 4.0 base score of 8.7 indicates a high-severity issue with network attack vector, no required privileges or user interaction, and a high impact on availability. Although no public exploits have been reported yet, the nature of unsafe reflection makes it a critical concern because attackers can exploit it remotely without authentication. The vulnerability stems from insufficient input validation and lack of controls on dynamic class loading mechanisms within the application. This flaw can be leveraged to terminate the application process, causing service outages and potential cascading effects on dependent systems or services. Given Kentico Xperience’s role in managing web content and digital experiences, such disruptions can impact business operations, customer engagement, and brand reputation.

For European organizations, the primary impact of CVE-2025-2794 is the disruption of web services and digital experience platforms powered by Kentico Xperience. This denial-of-service condition can lead to downtime of critical websites, e-commerce portals, and customer-facing applications, resulting in lost revenue, degraded user experience, and potential contractual penalties. Organizations in sectors such as retail, finance, government, and media that rely on Kentico for content management are particularly vulnerable. The unauthenticated nature of the exploit increases the risk of widespread attacks, including automated scanning and exploitation attempts. Additionally, prolonged outages could affect compliance with data availability and service-level agreements under European regulations like GDPR and NIS Directive. The reputational damage from service interruptions can also erode customer trust. While the vulnerability does not directly expose sensitive data or allow code execution beyond process termination, the availability impact alone is significant for operational continuity.

1. Apply official patches or updates from Kentico as soon as they are released to address CVE-2025-2794. 2. Until patches are available, implement strict input validation and sanitization on all user-supplied data that could influence class loading or reflection mechanisms within Kentico Xperience. 3. Deploy Web Application Firewalls (WAFs) configured to detect and block suspicious reflection patterns or malformed requests targeting the vulnerable endpoints. 4. Utilize Runtime Application Self-Protection (RASP) tools to monitor and prevent unsafe reflection at runtime. 5. Conduct thorough code reviews and security testing focused on dynamic code loading and reflection usage in custom modules or extensions. 6. Implement robust monitoring and alerting to detect abnormal process terminations or service disruptions indicative of exploitation attempts. 7. Restrict network access to Kentico management interfaces to trusted IPs and enforce least privilege principles. 8. Prepare incident response plans to quickly recover from potential denial-of-service events caused by this vulnerability.