Safety v$.$ Security: Comment as to whether the following vulnerabilities are a result of a lack of code safety or improper Information Security control$($s$)$ and explain your answer.

No white$-$listing of query string requests

Sending passwords in plaintext via email

Not setting a threshold of concurrent requests on a firewall to prevent DoS$/$DDoS attacks

Accidental unclosed database connections leading to memory leaks

Improper permissions in administrative areas of a website, allowing lower level users to gain unauthorized access to sensitive documents