GHSA-c4qr-gmr9-v23w

Source

https://github.com/advisories/GHSA-c4qr-gmr9-v23w

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/03/GHSA-c4qr-gmr9-v23w/GHSA-c4qr-gmr9-v23w.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-c4qr-gmr9-v23w

Aliases

CVE-2021-21322

Published

2021-03-03T02:18:08Z

Modified

2026-07-08T06:28:05Z

Severity

10.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N CVSS Calculator

Summary

Prefix escape

Details

Impact

By crafting a specific URL, it is possible to escape the prefix of the proxied backend service. If the base url of the proxied server is /pub/, a user expect that accessing /priv on the target service would not be possible. Unfortunately, it is.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Patches

All releases after v4.3.1 include the fix.

Workarounds

There are no workaround available.

For more information

If you have any questions or comments about this advisory:

Open an issue in fastify-reply-from
Email us at hello@matteocollina.com

Database specific

{
    "cwe_ids":  [
        "CWE-20"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2021-03-02T03:32:25Z",
    "nvd_published_at":  "2021-03-02T04:15:00Z",
    "severity":  "LOW"
}

References

Affected packages

npm / fastify-http-proxy

Package

Name: fastify-http-proxy; View open source insights on deps.dev
Purl: pkg:npm/fastify-http-proxy

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4.3.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/03/GHSA-c4qr-gmr9-v23w/GHSA-c4qr-gmr9-v23w.json"