What’s Vulnerable › Vulnerabilities

CVE-2020-11414

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-31 · updated 2026-06-17
• Weakness: CWE-22

Description

An issue was discovered in Progress Telerik UI for Silverlight before 2020.1.330. The RadUploadHandler class in RadUpload for Silverlight expects a web request that provides the file location of the uploading file along with a few other parameters. The uploading file location should be inside the directory where the upload handler class is defined. Before 2020.1.330, a crafted web request could result in uploads to arbitrary locations.

Affected products

• Telerik Ui For Silverlight: before 2020.1.330 — fixed in 2020.1.330

How to fix

Upgrade to a fixed version: Telerik Ui For Silverlight 2020.1.330. Check the vendor advisory for mitigations.

References

• https://docs.telerik.com/devtools/silverlight/controls/radupload/how-to/secure-upload-file-path
• https://docs.telerik.com/devtools/silverlight/controls/radupload/how-to/secure-upload-file-path

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