Is CVE-2017-9248 actively exploited?

Yes. CVE-2017-9248 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2017-9248 be exploited remotely?

The attack vector of CVE-2017-9248 has not been classified yet.

What is the CVSS score of CVE-2017-9248?

CVE-2017-9248 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2017-9248

HIGHCISA KEVIN THE WILD

CVE-2017-9248

Published: November 3, 2021

EPSS:87.80%probability of exploitation in 30 daysPercentile:99.5th

Official 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.

NVD Source

CISA KEV Advisory

Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability

Added to KEV: 2021-11-03Federal patch deadline: 2022-05-03

Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

Progress Telerik UI for ASP.NET AJAX and Sitefinity have a cryptographic weakness that can lead to encryption key disclosure, cross-site scripting (XSS), ViewState compromise, and file upload/download. The very high EPSS score of 0.87802 indicates a strong likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation. This is a critical vulnerability with multiple potential impacts.

This vulnerability is actively exploited in the wild. The cryptographic weakness is remotely exploitable, potentially through crafted web requests.

Recommended Action

Apply all available security updates for Progress Telerik UI for ASP.NET AJAX and Sitefinity. Ensure proper configuration of cryptographic keys and implement robust input validation to prevent XSS and other web-based attacks.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2017-9248 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2017-9248 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.