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

Source: https://junglewise.ai/threats/cve-2017-11357-telerik-ui-for-asp-net-ajax-insecure-direct-object-reference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-01-26. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2017-11357 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2023-01-26

Telerik UI for ASP.NET AJAX contains an insecure direct object reference (IDOR) vulnerability in the RadAsyncUpload component. The flaw allows remote attackers to bypass input restrictions to perform arbitrary file uploads, potentially leading to remote code execution.

## Quick answers

**Is CVE-2017-11357 exploited in the wild?** Yes. CVE-2017-11357 is known to be exploited in the wild, first recorded on 26 January 2023. Treat it as urgent.

**How severe is CVE-2017-11357?** Critical severity, with a CVSS score of 9.8, published 26 January 2023.

**Which products and versions are affected?** Telerik UI for ASP.NET AJAX before R2 2017 SP2 (2017.2.711).

**Is there a fix for CVE-2017-11357?** 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-2017-11357 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2017-11357?** 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

- Telerik UI for ASP.NET AJAX before R2 2017 SP2 (2017.2.711)

## Timeline

- 2017-08-23: disclosed: NVD Published Date
- 2018-01-24: other: Exploit-DB entry published
- 2023-01-26: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-01-26: advisory: CISA advisory published

## Related threats

- [Telerik UI for ASP.NET AJAX Unrestricted File Upload Vulnerability](https://junglewise.ai/threats/cve-2017-11317-telerik-ui-for-asp-net-ajax-unrestricted-file-upload)