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CVE-2017-9248

Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 and Sitefinity before 10.0.6412.0 does not properly protect…

Critical9.8Known exploitedEPSS 75.1%
Published
Updated
Reserved
Assigned by
mitre

Description

Telerik.Web.UI.dll in Progress Telerik UI for ASP.NET AJAX before R2 2017 SP1 and Sitefinity before 10.0.6412.0 does not properly protect Telerik.Web.UI.DialogParametersEncryptionKey or the MachineKey, which makes it easier for remote attackers to defeat cryptographic protection mechanisms, leading to a MachineKey leak, arbitrary file uploads or downloads, XSS, or ASP.NET ViewState compromise.

Exploited in the wild

CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Progress Telerik UI for ASP.NET AJAX and Sitefinity Cryptographic Weakness Vulnerability.

Added
3 Nov 2021
Fix due (US federal)
3 May 2022
Used by ransomware
Not known

Apply updates per vendor instructions.

Scores

CVSS scores of CVE-2017-9248, by who scored it
Scored byCVSSScoreVector
CISA-ADPADP (enrichment)3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVDNVD · Analyzed3.1Critical9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
75.1% · top 0.5% of all CVEs (3 Nov 2026)
CISA SSVC
Exploitation: active · Automatable: yes · Technical impact: total

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.

Weakness

Affected products

  • n/a

    • affected n/a

References (5)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .