Kentico Xperience Path Traversal Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2026-04-20

[ Description ]Official description

An authenticated remote code execution in Kentico Xperience allows authenticated users Staging Sync Server to upload arbitrary data to path relative locations. This results in path traversal and arbitrary file upload, including content that can be executed server side leading to remote code execution.This issue affects Kentico Xperience through 13.0.178.

CISA: Kentico Xperience contains a path traversal vulnerability that could allow an authenticated user's Staging Sync Server to upload arbitrary data to path relative locations.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 4 May 2026): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

• Patch on devnet.kentico.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ References ]References

• devnet.kentico.com/download/hotfixesPatch
• labs.watchtowr.com/bypassing-authentication-like-its-the-90s-pre-auth-rce-chain-s-in-ke…ExploitThird Party Advisory
• www.vulncheck.com/advisories/kentico-xperience-staging-media-file-upload-authenticated-rceThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource