Update Insufficient Access Control vulnerability.

[0xSandyy]

Checklist

• [x] I have searched the existing issues and pull requests for duplicates.

Type of Issue

• [ ] New vulnerability addition
• [ ] Feature request
• [x] Update existing vulnerability

Description

The Insufficient Access Control vulnerability doesn't have much content inside it. Though Access Control Vulnerability is pretty straightforward, I think it will be worth mentioning all the common access control mechanisms that are used and some best practices like role based access control, 2 step role transfer, etc

[kadenzipfel]

Sounds good to me, feel free to open a PR