CVE-2017-11357 — Progress Telerik UI for ASP

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.

01What is this vulnerability?

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.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2023-01-26. Ransomware use: Known.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-08-23T17:29:00.227
• Last modified: 2026-08-14T05:16:54.257
• Added to CISA KEV: 2023-01-26

09References

• www.telerik.com — http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecur…
• www.exploit-db.com — https://www.exploit-db.com/exploits/43874/
• www.telerik.com — http://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecur…
• www.exploit-db.com — https://www.exploit-db.com/exploits/43874/
• www.cisa.gov — https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-…