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
All releases after v4.3.1 include the fix.
There are no workaround available.
If you have any questions or comments about this advisory: * Open an issue in fastify-reply-from * Email us at hello@matteocollina.com
{
"github_reviewed_at": "2021-03-02T03:32:25Z",
"nvd_published_at": "2021-03-02T04:15:00Z",
"cwe_ids": [
"CWE-20"
],
"severity": "LOW",
"github_reviewed": true
}