CVE-2017-11357

Name: CVE-2017-11357
Creator: NVD / NIST
Published: 2017-08-23T17:29:00.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 75.71%

Last modified Jun 17, 2026

CVE-2017-11357 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 75.71% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

75.71%

99.5th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Feb 16, 2023.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Progress	Telerik Ui For Asp.Net Ajax	< 2020.1.114

References

http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecure-direct-object-referenceMitigation, Vendor Advisory
https://www.exploit-db.com/exploits/43874/Exploit, Third Party Advisory, VDB Entry
http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecure-direct-object-referenceMitigation, Vendor Advisory
https://www.exploit-db.com/exploits/43874/Exploit, Third Party Advisory, VDB Entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11357US Government Resource

Timeline

Published: Aug 23, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-11357?

How severe is CVE-2017-11357?

CVE-2017-11357 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 75.71% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-11357?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST