{"id":"CVE-2017-8700","aliases":["EUVD-2022-2236","GHSA-3rp6-rjw4-cq39"],"status":"published","title":"Cross-origin Resource Sharing bypass in ASP.NET Core","description":"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\".","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.10361,"percentile":0.95748,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2017-11-15T03:00:00Z","modified":"2026-10-24T10:30:42Z","fixes":[{"ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Core","fixed_in":["1.0.6","1.1.6"],"sources":["ghsa","osv"]},{"ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Cors","fixed_in":["1.0.6","1.1.6"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.0.6"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.0"},{"fixed":"1.1.6"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.0.6"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.0"},{"fixed":"1.1.6"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.0.6"}]}],"versions":["1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5"]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.0"},{"fixed":"1.1.6"}]}],"versions":["1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.1.5"]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0"},{"fixed":"1.0.6"}]}],"versions":["1.0.0","1.0.1","1.0.2","1.0.3","1.0.4","1.0.5"]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.AspNetCore.Mvc.Cors","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.1.0"},{"fixed":"1.1.6"}]}],"versions":["1.1.0","1.1.1","1.1.2","1.1.3","1.1.4","1.1.5"]}],"products":[{"vendor":"microsoft","product":"asp.net core"},{"vendor":"microsoft","product":"asp.net_core"},{"vendor":"microsoft corporation","product":"asp.net core"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8700","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","Vendor Advisory","fix","web"]},{"url":"http://www.securitytracker.com/id/1039793","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Issue Tracking","Third Party Advisory","VDB Entry","report"]},{"url":"http://www.securityfocus.com/bid/101712","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-8700","tags":["advisory"]},{"url":"https://github.com/aspnet/Announcements/issues/279","tags":["web"]},{"url":"https://github.com/github/advisory-database/issues/302","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3rp6-rjw4-cq39"}],"sources":{"cve":[{"id":"CVE-2017-8700","description":"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\".","status":"published","published":"2017-11-15T03:00:00Z","modified":"2024-09-16T19:56:33.698Z","updated_at":"2026-11-02T14:33:14.89365Z"}],"euvd":[{"id":"EUVD-2022-2236","description":"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\".","status":"published","published":"2017-11-15T03:00:00Z","modified":"2024-09-16T19:56:33Z","updated_at":"2026-11-03T00:55:18.708292Z"}],"ghsa":[{"id":"GHSA-3rp6-rjw4-cq39","title":"Cross-origin Resource Sharing bypass in ASP.NET Core","description":"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\".","status":"published","published":"2022-05-13T01:47:40Z","modified":"2023-01-27T05:02:34Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T14:36:18.427692Z"}],"nvd":[{"id":"CVE-2017-8700","description":"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\".","status":"published","published":"2017-11-15T03:29:02.06Z","modified":"2026-06-17T01:26:48.863Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:04:08.635428Z"}],"osv":[{"id":"CVE-2017-8700","description":"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\".","status":"published","published":"2017-11-15T03:29:02.06Z","modified":"2026-10-24T10:30:42.720180607Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:06.868403Z"},{"id":"GHSA-3rp6-rjw4-cq39","title":"Cross-origin Resource Sharing bypass in ASP.NET Core","description":"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\".","status":"published","published":"2022-05-13T01:47:40Z","modified":"2024-12-05T05:43:55.435973Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:46:36.092962Z"}]}}