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.
{ "nvd_published_at": "2021-05-17T18:15:00Z", "cwe_ids": [ "CWE-601" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2021-05-19T17:57:27Z" }