Next.js versions before 9.3.2 have a directory traversal vulnerability. Attackers could craft special requests to access files in the dist directory (.next). This does not affect files outside of the dist directory (.next). In general, the dist directory only holds build assets unless your application intentionally stores other assets under this directory. This issue is fixed in version 9.3.2.

A path traversal vulnerability in serve npm package version 7.0.1 allows the attackers to read content of arbitrary files on the remote server.

A bug in handling the ignore files and directories feature in serve 6.5.3 allows an attacker to read a file or list the directory that the victim has not allowed access to.

Next.js 7.0.0 and 7.0.1 has XSS via the 404 or 500 /_error page.

serve node module suffers from Improper Handling of URL Encoding by permitting access to ignored files if a filename is URL encoded.

serve node module before 6.4.9 suffers from a Path Traversal vulnerability due to not handling %2e (.) and %2f (/) and allowing them in paths, which allows a malicious user to view the contents of any directory with known path.

Information exposure through directory listings in serve 6.5.3 allows directory listing and file access even when they have been set to be ignored.

ZEIT Next.js 4 before 4.2.3 has Directory Traversal under the /_next request namespace.

ZEIT Next.js before 2.4.1 has directory traversal under the /_next and /static request namespace, allowing attackers to obtain sensitive information.