What are the reasons to avoid implementing the authorization process when using the PUT method in the HTTP protocol?

Using the PUT method without authorization can lead to serious security issues, as PUT is typically used to create or replace a resource at a given URI. Without implementing authorization, any user could modify or create data, which could result in:

• Data integrity violations
• Confidential information leaks
• The ability to perform "overwrite" or "substitution" attacks on data

Therefore, it is not recommended to omit the authorization process when using PUT. If the question is why you should not bypass authorization with PUT, the reason is that PUT changes the server's state, and such operations should be protected.

An example of the correct approach in Java using Spring Security:

@PutMapping("/resource/{id}")
@PreAuthorize("hasRole('USER')")
public ResponseEntity<?> updateResource(@PathVariable String id, @RequestBody Resource resource) {
    // resource update logic
}

Here, the PUT method is protected, and only authorized users with the USER role have access.