{"id":"CVE-2017-8700","aliases":["GHSA-3rp6-rjw4-cq39"],"url":"https://o3.security/vulnerability/CVE-2017-8700","summary":"Cross-origin Resource Sharing bypass in ASP.NET Core","details":"ASP.NET Core 1.0, 1.1, and 2.0 allow an attacker to bypass Cross-origin Resource Sharing (CORS) configurations and retrieve normally restricted content from a web application, aka \"ASP.NET Core Information Disclosure Vulnerability\".","published":"2017-11-15T03:29:02.060Z","modified":"2026-07-08T14:58:56.392074Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"Microsoft.AspNetCore.Mvc.Core","fixedVersion":"1.0.6"},{"ecosystem":"NuGet","name":"Microsoft.AspNetCore.Mvc.Core","fixedVersion":"1.1.6"},{"ecosystem":"NuGet","name":"Microsoft.AspNetCore.Mvc.Cors","fixedVersion":"1.0.6"},{"ecosystem":"NuGet","name":"Microsoft.AspNetCore.Mvc.Cors","fixedVersion":"1.1.6"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/101712"},{"type":"REPORT","url":"http://www.securitytracker.com/id/1039793"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8700"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T14:58:56.392074Z"}}