[easy-static-server] easy-static-server vulnerable to Directory Traversal

All versions of package easy-static-server are vulnerable to Directory Traversal due to missing input sanitization and sandboxes being employed to the req.url user input that is passed to the server code.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-25931
• https://gist.github.com/lirantal/fdfbe26561788c8194a54bf6d31772c9
• https://security.snyk.io/vuln/SNYK-JS-EASYSTATICSERVER-3153539
• https://github.com/cunjieliu/easyServer/blob/master/index.js#23L27
• https://github.com/advisories/GHSA-wcwm-c3mr-pxcr