CVE-2017-11357: Telerik UI for ASP.NET AJAX Insecure Direct Object Reference Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2023-01-26. EPSS: 77.7% chance of exploitation in the next 30 days.

Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user input to RadAsyncUpload, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.

Affected products

• Progress Telerik UI For ASP.NET AJAX: before 2020.1.114 (fixed in 2020.1.114)

Published 2017-08-23. Last modified 2026-08-14.