Open Redirect in koa-remove-trailing-slashes
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | koa-remove-trailing-slashes | < 2.0.2 | 2.0.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-23384
- https://github.com/vgno/koa-remove-trailing-slashes/commit/e7ce4000e9fe4d957332df1056640a22ebea28ee
- https://github.com/vgno/koa-remove-trailing-slashes
- https://github.com/vgno/koa-remove-trailing-slashes/blame/6a01ba8fd019bd3ece44879c553037ad96ba7d47/index.js#L31
- https://snyk.io/vuln/SNYK-JS-KOAREMOVETRAILINGSLASHES-1085708
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-601- Platform
- npm
- Package
koa-remove-trailing-slashes- Disclosed
- 10.02.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-r773-pmw3-f4mr - CC BY 4.0
Vulnerability history: koa-remove-trailing-slashes
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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