{"answers":{"affected":"8 open source packages ship an affected version, including Microsoft.AspNetCore.Mvc.Core and Microsoft.AspNetCore.Mvc.Cors. It affects 1 product.","exploited":"There is no known exploitation of CVE-2017-8700 in the wild and no public exploit code.","fix":"Upgrade Microsoft.AspNetCore.Mvc.Core to a fixed version for your release line: 1.0.6 or 1.1.6.","what":"CVE-2017-8700 is a high-severity vulnerability in Microsoft Corporation ASP.NET Core, published on 15 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2017-8700 and fix it if it is affected.\n\nWhat it is: CVE-2017-8700 is a high-severity vulnerability in Microsoft Corporation ASP.NET Core, published on 15 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2017-8700 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.AspNetCore.Mvc.Core (NuGet): affected from 1.0.0; fixed in 1.0.6\n- Microsoft.AspNetCore.Mvc.Core (NuGet): affected from 1.0.0; fixed in 1.0.6\n- Microsoft.AspNetCore.Mvc.Core (NuGet): affected from 1.1.0; fixed in 1.1.6\n- Microsoft.AspNetCore.Mvc.Core (NuGet): affected from 1.1.0; fixed in 1.1.6\n- Microsoft.AspNetCore.Mvc.Cors (NuGet): affected from 1.0.0; fixed in 1.0.6\n- Microsoft.AspNetCore.Mvc.Cors (NuGet): affected from 1.0.0; fixed in 1.0.6\n- Microsoft.AspNetCore.Mvc.Cors (NuGet): affected from 1.1.0; fixed in 1.1.6\n- Microsoft.AspNetCore.Mvc.Cors (NuGet): affected from 1.1.0; fixed in 1.1.6\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2017-8700/ (Markdown: https://insights.sbomify.com/CVE-2017-8700/index.md)","id":"CVE-2017-8700","markdown":"https://insights.sbomify.com/CVE-2017-8700/index.md","name":"CVE-2017-8700","record":{"aliases":["ECHO-06b1-ea74-05f0","GHSA-3rp6-rjw4-cq39"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"ASP.NET Core framework","requires_auth":"none","summary":"Attackers can bypass CORS restrictions in ASP.NET Core to retrieve restricted content from web applications.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"asp.net_core","vendor":"microsoft"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.0"},"cwes":[],"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\".","ecosystems":["NuGet"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Cross-origin Resource Sharing bypass in ASP.NET Core","id":"CVE-2017-8700","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"security_feature_bypass","year":"2017"},"n_packages":8,"n_references":3,"next":{"headline":"Privilege escalation in Windows Error Reporting (WER)","id":"CVE-2017-8702"},"packages":[{"ecosystem":"NuGet","fixed":["1.0.6"],"introduced":["1.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Core","purl":null,"source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.0.6"],"introduced":["1.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Core","purl":"pkg:nuget/Microsoft.AspNetCore.Mvc.Core","source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.1.6"],"introduced":["1.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Core","purl":null,"source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.1.6"],"introduced":["1.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Core","purl":"pkg:nuget/Microsoft.AspNetCore.Mvc.Core","source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.0.6"],"introduced":["1.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Cors","purl":null,"source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.0.6"],"introduced":["1.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Cors","purl":"pkg:nuget/Microsoft.AspNetCore.Mvc.Cors","source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.1.6"],"introduced":["1.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Cors","purl":null,"source":"GHSA-3rp6-rjw4-cq39"},{"ecosystem":"NuGet","fixed":["1.1.6"],"introduced":["1.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.Mvc.Cors","purl":"pkg:nuget/Microsoft.AspNetCore.Mvc.Cors","source":"GHSA-3rp6-rjw4-cq39"}],"prev":{"headline":"Code injection in Windows Shell","id":"CVE-2017-8699"},"products":["ASP.NET Core"],"published":"2017-11-15","related":[{"cvss_score":9.9,"headline":"ASP.NET Security Feature Bypass Vulnerability","id":"CVE-2025-55315","kev_date_added":null,"published":"2025-10-14"},{"cvss_score":9.4,"headline":"ASP.NET Core Tampering Vulnerability","id":"CVE-2026-88092","kev_date_added":null,"published":"2026-10-13"},{"cvss_score":9.1,"headline":"ASP.NET Core Elevation of Privilege Vulnerability","id":"CVE-2026-40372","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":8.8,"headline":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","id":"CVE-2021-43877","kev_date_added":null,"published":"2021-12-15"},{"cvss_score":8.8,"headline":"Remote code execution in ASP.NET Core","id":"CVE-2020-0603","kev_date_added":null,"published":"2020-01-14"},{"cvss_score":8.8,"headline":"Elevation of privilege in ASP.NET Core","id":"CVE-2019-1302","kev_date_added":null,"published":"2019-09-11"},{"cvss_score":8.8,"headline":"ASP.NET Core allow an elevation of privilege","id":"CVE-2018-0787","kev_date_added":null,"published":"2018-03-14"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-16","vendors":["Microsoft Corporation"]},"summary":"Attackers can bypass CORS restrictions in ASP.NET Core to retrieve restricted content from web applications.","url":"https://insights.sbomify.com/CVE-2017-8700/"}