CVE-2021-23384
Open Redirect in koa-remove-trailing-slashes
5.4
MEDIUM
CVSS 3.1
EPSS 0.21%
Description
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.
How to fix CVE-2021-23384
To remediate CVE-2021-23384, upgrade the affected package to a fixed version below.
- —upgrade to 2.0.2 or later
Is CVE-2021-23384 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 2.0.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |