CVE-2025-2749: Kentico Xperience Path Traversal Vulnerability

Kentico Xperience contains a path traversal weakness that lets an authenticated user reach the Staging Sync Server and place arbitrary data into locations determined by relative paths. The issue matters because it combines improper path handling with unrestricted file operations, giving an attacker who already holds valid credentials a route to write content outside intended directories on the affected system.

How it works

The vulnerability is tracked under CWE-22 (path traversal) and CWE-434 (unrestricted upload of file with dangerous type). An authenticated user interacting with the Staging Sync Server can supply path elements that resolve outside the expected target directory. The server then writes the supplied data to the resulting location without sufficient validation of the final path. No further exploit mechanics are described in the available summary.

Am I affected? How to find it in your systems

Kentico Xperience is a web content management platform that commonly runs on Windows servers hosting ASP.NET applications. Begin by inventorying all internet-facing and internal instances of Kentico Xperience, paying particular attention to deployments that enable the Staging Sync Server feature. Review configuration files and administrative settings that control staging synchronization. Because exact affected versions are not stated here, compare installed builds directly against the vendor advisory. Look for authentication events and file-write operations tied to the staging endpoints in application and web-server logs; anomalous relative-path strings or unexpected files appearing outside normal content directories can indicate attempted abuse.

How to remediate

Apply the vendor-supplied update referenced in the official advisory as the primary remediation step. After patching, review and restrict the accounts permitted to use the Staging Sync Server, and confirm that file-upload handling follows the vendor’s current hardening guidance for this product class. Where the installation integrates with cloud services, apply any applicable requirements from CISA BOD 22-01.

If you can't patch immediately

• Segment the Kentico Xperience servers so that only explicitly authorized management hosts can reach the Staging Sync Server endpoints.
• Disable or tightly scope the staging synchronization feature until the update can be applied.
• Monitor authentication and file-system activity on the affected hosts for indicators of relative-path manipulation.
• If mitigations cannot be implemented, discontinue use of the product as stated in the CISA guidance.

If your data may have been exposed

Path traversal issues that permit arbitrary file placement have been used in breaches. You can run a free exposure scan of your organization’s email addresses against known breach data to check for prior incidents involving the affected environment.