{"id":"GHSA-fpv6-f8jw-rc3r","summary":"Elvish vulnerable to remote code execution via the web UI backend","details":"### Impact\n\nElvish's backend for the experimental web UI (started by `elvish -web`) hosts an endpoint that allows executing the code sent from the web UI.\n\nThe backend does not check the origin of requests correctly. As a result, if the user has the web UI backend open and visits a compromised or malicious website, the website can send arbitrary code to the endpoint in localhost.\n\n### Patches\n\nAll Elvish releases since 0.14.0 no longer include the experimental web UI, although it is still possible for the user to build a version from source that includes it.\n\nThe issue can be patched for previous versions by removing the web UI (found in web, pkg/web or pkg/prog/web, depending on the exact version).\n\n### Workarounds\n\nDo not use the experimental web UI.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please email xiaqqaix@gmail.com.","aliases":["CVE-2021-41088","GO-2022-0937"],"modified":"2026-05-07T05:01:53.344407715Z","published":"2021-09-23T23:17:33Z","database_specific":{"nvd_published_at":"2021-09-23T20:15:00Z","cwe_ids":["CWE-346","CWE-668"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2021-09-23T21:06:47Z"},"references":[{"type":"WEB","url":"https://github.com/elves/elvish/security/advisories/GHSA-fpv6-f8jw-rc3r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41088"},{"type":"WEB","url":"https://github.com/elves/elvish/commit/ccc2750037bbbfafe9c1b7a78eadd3bd16e81fe5"},{"type":"PACKAGE","url":"https://github.com/elves/elvish"}],"affected":[{"package":{"name":"github.com/elves/elvish","ecosystem":"Go","purl":"pkg:golang/github.com/elves/elvish"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.14.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/09/GHSA-fpv6-f8jw-rc3r/GHSA-fpv6-f8jw-rc3r.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H"}]}