Add link to CVE on advisories

Problem/Motivation

Advisories contain a CVE ID but it is not a link.
I think it would be useful to link to the CVE page on either https://nvd.nist.gov/ or https://www.cve.org/.
This would allow people to easily get more information about the CVE.

Steps to reproduce

Proposed resolution

Automatically add a link on the CVE ID.

Remaining tasks

User interface changes

API changes

Data model changes