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Vulnerability record · CVE-2017-0256 · published 12 May 2017

CVE-2017-0256: Microsoft asp.net model view controller improper input validation vulnerability

Microsoft · Asp.Net Model View Controller

A spoofing vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.

5.3 CVSS 3.0 Medium EPSS 3.5% · top 11.1% CWE-20 · Improper input validation
5.3CVSS 3.0 base score, v2 5.0
3.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
18Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A spoofing vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

18 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/aspnet/Announcements/issues/239 Technical DescriptionThird Party Advisory
https://github.com/aspnet/Announcements/issues/239 Technical DescriptionThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-0256), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.