GHSA-f4hq-453j-p95f
Open redirect in Slashify
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
The package is an Express middleware that normalises routes by stripping any final slash, redirecting, for example, `bookings/latest/` to `bookings/latest`. However, it does not validate the path it redirects to in any way. In particular, if the path starts with two slashes (or two backslashes, or a slash and a backslash, etc.) it may redirect to a different domain.
Consider the [example from the docs](https://www.npmjs.com/package/slashify#usage). Assume we have run it and started a server on `localhost:3000`, then visiting `localhost:3000///github.com/` redirects you to https://github.com.
## Recommendation
This vulnerability is currently un-patched in the `slashify` package so there is no known safe version of this package. Discontinuing use of `slashify` is recommended.
References
External links from the advisory. They lead to third-party sites.