fastify-reply-from is an npm package which is a fastify plugin to forward the current http request to another server. In fastify-reply-from before version 4.0.2, 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. In affected versions, it is possible. This is fixed in version 4.0.2.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| fastify-reply-from(npm) | 0 | 4.0.2 | N/A |
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