November 3, 2021 · Applied Cybernetics Group
CVE-2017-9248 — Progress ASP.NET AJAX and Sitefinity
Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability
- Added to KEV
2021-11-03- Federal due date
2022-05-03- Vendor
- Progress
- Product
- ASP.NET AJAX and Sitefinity
- EPSS
- 99.6th percentile (score 0.894, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2017-9248
CISA short description
Progress Telerik UI for ASP.NET AJAX and Sitefinity have a cryptographic weakness in Telerik.Web.UI.dll that can be exploited to disclose encryption keys (Telerik.Web.UI.DialogParametersEncryptionKey and/or the MachineKey), perform cross-site-scripting (XSS) attacks, compromise the ASP.NET ViewState, and/or upload and download files.
Required action
Apply updates per vendor instructions.