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CVE-2017-0256
A spoofing vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.
Medium5.3EPSS 3.5%
- Published
- Updated
- Reserved
- Assigned by
- microsoft
Description
A spoofing vulnerability exists when the ASP.NET Core fails to properly sanitize web requests.
Timeline
ID reserved
By microsoft
- 8 months later
· 8 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 3.5% · top 11% of all CVEs (8 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
Microsoft Corporation · ASP.NET Core
- affected ASP.NET Core
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- NuGetMicrosoft.AspNetCore.MvcGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.AbstractionsGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.ApiExplorerGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.CoreGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.CorsGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.DataAnnotationsGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.Formatters.JsonGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.Formatters.XmlGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.LocalizationGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.RazorGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.Razor.HostGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.TagHelpersGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.ViewFeaturesGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetMicrosoft.AspNetCore.Mvc.WebApiCompatShimGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetSystem.Net.HttpGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetSystem.Net.Http.WinHttpHandlerGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetSystem.Net.SecurityGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetSystem.Net.WebSockets.ClientGHSA-j8f4-2w4p-mhjc (opens in a new tab)
- NuGetSystem.Text.Encodings.WebGHSA-j8f4-2w4p-mhjc (opens in a new tab)
References (1)
- https://github.com/aspnet/Announcements/issues/239 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-j8f4-2w4p-mhjc (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2017-0256)Record last updated .