Kentico Xperience before 13.0.178 has a specific set of allowed ContentUploader file extensions for unauthenticated uploads; however, because .zip is processed through TryZipProviderSafe, there is additional functionality to create files with other extensions. NOTE: this is a separate issue not necessarily related to SVG or XSS.
- https://devnet.kentico.com/download/hotfixes
- https://labs.watchtowr.com/xss-to-rce-by-abusing-custom-file-handlers-kentico-xperience-cms-cve-2025-2748/
- https://github.com/ARPSyndicate/cve-scores