{"id":"GHSA-r773-pmw3-f4mr","summary":"Open Redirect in koa-remove-trailing-slashes","details":"The package koa-remove-trailing-slashes before 2.0.2 are vulnerable to Open Redirect via the use of trailing double slashes in the URL when accessing the vulnerable endpoint (such as `https://example.com//attacker.example/`). The vulnerable code is in `index.js::removeTrailingSlashes()`, as the web server uses relative URLs instead of absolute URLs.","aliases":["CVE-2021-23384"],"modified":"2026-03-13T21:56:59.448210Z","published":"2022-02-10T23:47:27Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2021-05-19T17:57:27Z","nvd_published_at":"2021-05-17T18:15:00Z","cwe_ids":["CWE-601"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23384"},{"type":"WEB","url":"https://github.com/vgno/koa-remove-trailing-slashes/commit/e7ce4000e9fe4d957332df1056640a22ebea28ee"},{"type":"PACKAGE","url":"https://github.com/vgno/koa-remove-trailing-slashes"},{"type":"WEB","url":"https://github.com/vgno/koa-remove-trailing-slashes/blame/6a01ba8fd019bd3ece44879c553037ad96ba7d47/index.js#L31"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JS-KOAREMOVETRAILINGSLASHES-1085708"}],"affected":[{"package":{"name":"koa-remove-trailing-slashes","ecosystem":"npm","purl":"pkg:npm/koa-remove-trailing-slashes"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.0.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/02/GHSA-r773-pmw3-f4mr/GHSA-r773-pmw3-f4mr.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}