# CVE-2017-11317: Telerik UI for ASP.NET AJAX Unrestricted File Upload Vulnerability

Source: https://junglewise.ai/threats/cve-2017-11317-telerik-ui-for-asp-net-ajax-unrestricted-file-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-04-11. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2017-11317 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-04-11

Telerik.Web.UI in Progress Telerik UI for ASP.NET AJAX uses weak RadAsyncUpload encryption, allowing remote attackers to perform arbitrary file uploads or execute arbitrary code via a deserialization flaw. The vulnerability stems from inadequate encryption strength in the file upload component.

## Quick answers

**Is CVE-2017-11317 exploited in the wild?** Yes. CVE-2017-11317 is known to be exploited in the wild, first recorded on 11 April 2022. Treat it as urgent.

**How severe is CVE-2017-11317?** Critical severity, with a CVSS score of 9.8, published 11 April 2022.

**Which products and versions are affected?** Progress Telerik UI for ASP.NET AJAX (RadAsyncUpload) before R1 2017 and R2 before R2 2017 SP2.

**Is there a fix for CVE-2017-11317?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2017-11317 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2017-11317?** Check whether you run Telerik User Interface (UI) for ASP.NET AJAX. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Progress Telerik UI for ASP.NET AJAX (RadAsyncUpload) before R1 2017 and R2 before R2 2017 SP2

## Timeline

- 2017-08-23: disclosed: NVD Published Date
- 2022-04-11: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

## Related threats

- [Telerik UI for ASP.NET AJAX Insecure Direct Object Reference Vulnerability](https://junglewise.ai/threats/cve-2017-11357-telerik-ui-for-asp-net-ajax-insecure-direct-object-reference)